/ Dictionary Meaning of underclothes Find definitions for: un•der•clothes Pronunciation: (un'dur-klōz", -klōz"), [key] — n. (used with a pl. v.) clothes worn under outer clothes. underwear. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underclothes (Thesaurus) underclassman undercoat Related ContentDaily Word Quiz: opprobriumAnalogy of the Day: Today's AnalogySpelling Bee: Today's Spelling BeeKids' Word Quiz: preparatoryCrossword: Crossword Puzzle GuideFrequently Misspelled WordsFrequently Mispronounced WordsEasily Confused WordsWriting & Language