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