- Situated, occurring, or originating outside the Milky Way galaxy: extragalactic radio sourcesMore example sentences
- Hence the whole foundation of extragalactic astronomy and Big Bang theory is swept away’ .
- It is definitely an extragalactic background.
- The number of these sources is consistent with the expected number of extragalactic sources in the background sky.
More definitions of extragalacticDefinition of extragalactic in:
- The US English dictionary