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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for extragalactic

extragalactic
/ (ˌɛkstrəɡəˈlæktɪk) /

adjective

occurring or existing beyond the Galaxy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012