/ Dictionary / Index U underwear: Meaning and Definition of Find definitions for: un•der•wear Pronunciation: (un'dur-wâr"), [key] — n. clothing worn next to the skin under outer clothes. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underwear (Thesaurus) under way underweight Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language