extragalactic

[ ek-struh-guh-lak-tik ]
/ ˌɛk strə gəˈlæk tɪk /

adjective

outside the Milky Way system.

Origin of extragalactic

First recorded in 1850–55; extra- + galactic

British Dictionary definitions for extragalactic

extragalactic
/ (ˌɛkstrəɡəˈlæktɪk) /

adjective

occurring or existing beyond the Galaxy