extragalactic

American

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

adjective

outside the Milky Way system.

extragalactic British

/ 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

Etymology

Origin of extragalactic

First recorded in 1850–55; extra- + galactic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This is the first time a star of extragalactic origin has been found in the vicinity of the super massive black hole.

From Science Daily • Dec. 4, 2023

Last year, IceCube physicists reported 79 neutrinos coming from the heart of a nearby galaxy called NGC 1068, the first steady source of extragalactic neutrinos pinpointed.

From Science Magazine • Jun. 21, 2023

What began during lockdown as a live multimedia cartoon, about a feline mission to stop extragalactic rats from devouring the moon, is now a hilarious graphic novel.

From New York Times • May 4, 2022

The spacecraft could perform other transformational science, such as studying the extragalactic background light, the collective cosmic glow from all luminous objects in the observable universe.

From Scientific American • Jan. 6, 2022

At such a rate, we will reach it in ten billion years, and extragalactic astronomy will then be a great deal easier.

From "Cosmos" by Carl Sagan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023