/ Dictionary / Index C cubit: Meaning and Definition of Find definitions for: cu•bit Pronunciation: (ky'bit), [key] — n. an ancient linear unit based on the length of the forearm, from elbow to the tip of the middle finger, usually from 17 to 21 in. (43 to 53 cm). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cubit (Thesaurus) cubism cubital Related Content Daily Word Quiz: reluctant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language