/ Dictionary / Index M megabit: Meaning and Definition of Find definitions for: meg•a•bit Pronunciation: (meg'u-bit"), [key] — n. Computers. 2 (1,048,576) bits. (loosely) one million bits. Abbr.: Mb Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: megabit (Thesaurus) mega- megabuck Related Content Daily Word Quiz: abdicate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language