/ Dictionary / Index C cap sleeve: Meaning and Definition of Find definitions for: cap' sleeve' Pronunciation: [key] a short sleeve designed to cover the shoulder and the top of the arm, with little or no extension under the arm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. capsizing moment capsomere Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language