/ Dictionary / Index U underclass: Meaning and Definition of Find definitions for: un•der•class Pronunciation: (un'dur-klas", -kläs"), [key] — n. a social stratum consisting of impoverished persons with very low social status. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underclass (Thesaurus) undercharge underclassman Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language