ga·​lac·​tic | \gə-ˈlak-tik \

Definition of galactic 

1 : of or relating to a galaxy and especially the Milky Way galaxy

2 : huge a galactic sum of money

Keep scrolling for more

Examples of galactic in a Sentence

a galactic serving of soda that would have been enough for three moviegoers

Recent Examples on the Web

In galactic terms, light has built up a trivially small lead over our LHC protons. John Timmer, Ars Technica, "Why things can look like they’re moving faster than light," 9 Sep. 2018 The trend still plays on galactic colors, like purples, blues, and pinks (along with metallic neutrals) but in a sheer, subtle way more likely to be featured on Glossier's Instagram than your teen cousin's favorite YouTuber. Rachel Nussbaum, Glamour, "This Dreamy Fall Trend Is Like Unicorn Makeup's Cooler Older Sister," 19 Sep. 2018 Type Ia explosions also create and disperse heavy elements (including the iron in the hemoglobin running through our veins), and so play crucial roles in studies of galactic evolution. Shannon Hall, Scientific American, "The Milky Way's Speediest Stars Could Solve a 50-Year-Old Mystery," 9 May 2018 But a new study sheds some light on the size of our galaxy, suggesting that the stars at the galactic edge are about twice as far away from the center as previously thought. Jay Bennett, Popular Mechanics, "The Milky Way Galaxy Might Be Twice as Wide as Astronomers Thought," 13 June 2018 Helmi and her team used this data to conclude that the Milky Way’s inner region contains hints of debris from an ancient galactic impact. Ramin Skibba, WIRED, "This Galactic Collision Shaped the History of the Milky Way," 8 July 2018 Although hundreds of galactic gravitational lenses are known, only a few are sufficiently close by to allow their individual stars to be seen. Maya Miller, Scientific American, "Einstein’s Greatest Theory Validated on a Galactic Scale," 22 June 2018 Additional sky surveys, and refined measurements of the farthest disk stars, will continue to dial in the border of our galactic neighborhood of the cosmos. Jay Bennett, Popular Mechanics, "The Milky Way Galaxy Might Be Twice as Wide as Astronomers Thought," 13 June 2018 Many of our models for dark matter predict a hierarchy of structures—halos of dark matter in and around galactic clusters and individual galaxies that hold them together. Chris Lee, Ars Technica, "Dark matter halos may leave twinkling wake in galaxies," 31 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'galactic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of galactic

1839, in the meaning defined at sense 1

History and Etymology for galactic

borrowed from New Latin galacticus (taken as derivative of Galaxias "Milky Way"), borrowed from Greek galaktikós "milky," from galakt-, gála "milk" + -ikos -ic entry 1 — more at galaxy

Keep scrolling for more

Learn More about galactic

Statistics for galactic

Last Updated

6 Dec 2018

Look-up Popularity

Time Traveler for galactic

The first known use of galactic was in 1839

See more words from the same year

Keep scrolling for more

More Definitions for galactic


ga·​lac·​tic | \gə-ˈlak-tik \

Kids Definition of galactic

: of or relating to a galaxy galactic light

Keep scrolling for more

More from Merriam-Webster on galactic

Rhyming Dictionary: Words that rhyme with galactic

Thesaurus: All synonyms and antonyms for galactic

Spanish Central: Translation of galactic

Nglish: Translation of galactic for Spanish Speakers

Britannica English: Translation of galactic for Arabic Speakers

Comments on galactic

What made you want to look up galactic? Please tell us where you read or heard it (including the quote, if possible).


living or existing for a long time

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!