/ Dictionary / Index U undersleeve: Meaning and Definition of Find definitions for: un•der•sleeve Pronunciation: (un'dur-slēv"), [key] — n. a separate sleeve worn under the sleeve of a dress and visible through it or extending beyond it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. underskirt underslung Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language