/ Dictionary / Index I irregular galaxy: Meaning and Definition of Find definitions for: irreg'ular gal'axy Pronunciation: [key] — Astron. Astron. a galaxy with no specific form and a relatively low mass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. irregular irregularity Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language