Breadcrumb Home > Dictionary > Index C CU: Meaning and Definition of Find definitions for: CU Pronunciation: [key] close-up. Cu Pronunciation: [key] — Symbol, Chem. copper. cu Pronunciation: [key] cubic. Cu. Pronunciation: [key] cumulus. cu. Pronunciation: [key] cubic. cumulus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cu (Thesaurus) CT scanner cuadrilla ✖ Related Content Daily Word Quiz: triumphalism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language