Meaning of metagalaxy

met•a•gal•ax•y

Pronunciation: (met"u-gal'uk-sē), [key]
— pl. -ax•ies.
  1. the complete system of galaxies; the Milky Way and all the surrounding galaxies.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.