Standard Lemma guide

asteroid

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • ăs'tə-roid"
  • /ˈæst(ə)ɹɔɪd/
  • US: Recorded audio is listed in the source snapshot.
  • homophone: astroid (one pronunciation)
  • rhymes with -ɔɪd
  • CMU ARPABET: AE1 S T ER0 OY2 D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A naturally occurring solid object, which is smaller than a planet and a dwarf planet, larger than a meteoroid and not a comet, that orbits a star and often has an irregular shape.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

In the Solar System, such a body that orbits within the orbit of Jupiter.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Any member of the taxonomic class Asteroidea; a starfish.

Definition source: English Wiktionary via Wiktextract

Topics: biology, natural-sciences, zoology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adjective satellite

Meaning 4

shaped like a star

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: star-shaped

Antonyms: none provided

5

noun

Meaning 5

any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: minor planet, planetoid

Narrower terms: Chiron, Apollo asteroid, Ceres, Pallas, Vesta

History

Etymology

]Introduced by German–British astronomer William Herschel in 1802 upon the suggestion of classical scholar Charles Burney Jr. (1757–1817), the son of music historian Charles Burney, a friend of Herschel's. Probably coined as a learned borrowing from Ancient Greek ἀστεροειδής (asteroeidḗs, “starlike”), from ἀστήρ (astḗr, “celestial body”) + -ειδής (-eidḗs, adjective-forming suffix). By surface analysis, aster + -oid.

Borrowed from Ancient Greek ἀστεροειδής (asteroeidḗs), from ἀστήρ (astḗr, “star”) + εἶδος (eîdos, “form”). Analyzable as aster- + -oid. Piecewise doublet of etymology 1. Compare also the botanical taxon Asteroideae.

Across languages

Translations

111 source translations are retained for this English entry.

  • Albanian: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Arabic: كُوَيْكِب (kuwaykib) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Armenian: աստերոիդ (asteroid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Armenian: աստղակերպ (astġakerp) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Assamese: গ্ৰহাণু (grohanu) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Asturian: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Asturian: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Azerbaijani: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Basque: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Belarusian: астэро́ід (asteróid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Bengali: গ্রহাণু (grohanu) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Bulgarian: астерои́д (asteroíd) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Burmese: ဥက္ကာပျံ (ukka-pyam) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Catalan: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Catalan: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Cherokee: ᏅᏯ ᏧᎳᎬᎭᎸᏓ (nvya tsulagvhalvda) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Chinese Cantonese: 小行星 — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Chinese Mandarin: 小行星 (xiǎoxíngxīng) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Czech: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Danish: småplanet — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Danish: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Danish: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Dutch: planetoïde — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Dutch: asteroïde — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Esperanto: asteroido — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Estonian: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Faroese: smástjørna — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Finnish: asteroidi — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • French: astéroïde — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Galician: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Galician: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Georgian: ასტეროიდი (asṭeroidi) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Georgian: მცირე ცთომილები (mcire ctomilebi) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • German: Asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Greek: αστεροειδής (asteroeidís) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Gujarati: લઘુગ્રહ (laghugrah) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hawaiian: hōkūnaʻi — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hebrew: אַסְטֶרוֹאִיד (astero'íd) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hindi: क्षुद्रग्रह (kṣudragrah) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hindi: उपग्रह (upagrah) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hungarian: kisbolygó — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Hungarian: aszteroida — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Icelandic: smástirni — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Ido: asteroido — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Indonesian: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Indonesian: planetoid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Irish: astaróideach — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Irish: mionphláinéad — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Italian: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Italian: pianetino — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Italian: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Japanese: 小惑星 (shōwakusei) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Kannada: ಕ್ಷುದ್ರ ಗ್ರಹ (kṣudra graha) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Kazakh: астероид (asteroid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Korean: 소행성 (sohaengseong) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Northern Kurdish: asteroîd — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Kyrgyz: астероид (asteroid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Lao: ດາວເຄາະນ້ອຍ (dāo khǫ nǭi) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Latvian: asteroīds — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Lithuanian: asteroidas — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Macedonian: астерои́д (asteroíd) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Malay: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Malayalam: ഛിന്നഗ്രഹം (chinnagrahaṁ) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Māori: aorangi iti — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Marathi: लघुग्रह (laghugrah) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Mongolian: астероид (asteroid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Mongolian: бага гариг (baga garig) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Mongolian: жижиг гараг (žižig garag) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Navajo: tsé naatʼaʼí — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Norwegian Bokmål: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Norwegian Nynorsk: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Pashto: استرويد (asteroyid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Iranian Persian: سَیَّارَک (sayyârak) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Polish: asteroida — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Polish: planetoida — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Portuguese: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Portuguese: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Quechuan: puriq quyllurcha — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Romanian: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Russian: астеро́ид (asteróid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Russian: ма́лая плане́та (málaja planéta) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Serbo-Croatian: астеро̀ӣд — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Serbo-Croatian: asteròīd — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Sindhi: گِرَھِڙِي (girahirree) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Sinhalese: ක්ෂුද්ර ග්රහයා (kṣudra grahayā) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Sinhalese: ග්රහක (grahaka) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Slovak: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Slovene: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Spanish: asteroide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Spanish: planetoide — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Swedish: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tagalog: malatala — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tagalog: asteroyde — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tagalog: asteroyd — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tajik: сайёрак (sayyorak) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tajik: астероид (asteroyid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tamil: நுண்கோள் (nuṇkōḷ) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tatar: астероид (asteroid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Telugu: గ్రహశకలం (grahaśakalaṁ) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Thai: ดาวเคราะห์น้อย (daao-krɔ́-nɔ́ɔi) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Tibetan: སྐར་རྡོ (skar rdo) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Turkish: asteroit — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Turkmen: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Ukrainian: астеро́їд (asterójid) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Urdu: سَیّارْچَہ (saiyārca) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Uyghur: ئاستروئىد (astro'id) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Uyghur: كىچىك سەييارە (kichik seyyare) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Uzbek: asteroid — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Uzbek: kichik sayyora — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Vietnamese: tiểu hành tinh — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
  • Yiddish: אַסטערויד (asteroyd) — astronomy: a naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star
Real reading context

asteroid in complete knowledge articles