Astron. the total assemblage of all galaxies, including all intergalactic matter; the measurable material universe
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- metagalactic adjective
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. met·a·gal·ax·ies
The assemblage of all galaxies; the entire physical universe.