adj ·5 syllables ·Uncommon ·Advanced level

Definitions

Adjective

1. 1
   Originating outside of the Milky Way galaxy. not-comparable

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

2. 2
   Originating outside of any galaxy. not-comparable
3. 3
   Originating outside of the local galaxy. not-comparable

Adjective

1. 1
   outside or beyond a galaxy wordnet

Synonyms

All synonyms

alienanagalacticastralastronomicastronomicalastrophysical

Antonyms

All antonyms

galacticintragalactic

Example

More examples

"Extragalactic stars can only be observed with optic instruments."

Etymology

From extra- + galactic.

Related phrases

extragalactic background lightmilky way

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.