/ Dictionary / Index O omega: Meaning and Definition of Find definitions for: o•me•ga Pronunciation: (ō-mē'gu, ō-mā'-, ō-meg'u), [key] — n. the 24th and last letter of the Greek alphabet (&OHgr;, &ohgr;). the vowel sound represented by this letter. the last of any series; the end. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: omega (Thesaurus) Omdurman omega-3 fatty acid Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language