Standard Lemma guide

extragalactic

adj · 4 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.

  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: EH2 K S T R AH0 G AH0 L AE1 K T IH0 K Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Originating outside of the Milky Way galaxy.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: astronomy, natural-sciences

Examples

  • Extragalactic astronomy is the study of things outside the Milky Way.

Meaning relationships

Synonyms: none provided

Antonyms: galactic

2

adj

Meaning 2

Originating outside of any galaxy.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: galactic, intragalactic

3

adj

Meaning 3

Originating outside of the local galaxy.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: galactic

4

adjective

Meaning 4

outside or beyond a galaxy

Definition source: Princeton WordNet 3.0

Examples

  • extragalactic nebula

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *h1éǵh Proto-Indo-European *-s Proto-Indo-European *h1éǵhs Proto-Indo-European *-teros Proto-Indo-European *h1eǵhsteros Proto-Italic *eksteros Latin exter Latin extrā English extra- English galactic English extragalactic From extra- + galactic.

Across languages

Translations

14 source translations are retained for this English entry.

  • French: extragalactique — originating outside of the Milky Way
  • Irish: eachtar-réaltrach — originating outside of the Milky Way
  • Polish: pozagalaktyczny — originating outside of the Milky Way
  • Polish: ekstragalaktyczny — originating outside of the Milky Way
  • Esperanto: ekstergalaksia — originating outside of a galaxy
  • French: extragalactique — originating outside of a galaxy
  • Irish: eachtar-réaltrach — originating outside of a galaxy
  • Italian: estragalattico — originating outside of a galaxy
  • Italian: extragalattico — originating outside of a galaxy
  • Persian: فراکهکشانی (farâkahkešâni) — originating outside of a galaxy
  • Polish: pozagalaktyczny — originating outside of a galaxy
  • Polish: ekstragalaktyczny — originating outside of a galaxy
  • Romanian: extragalactic — originating outside of a galaxy
  • Spanish: extragaláctico — originating outside of a galaxy