/ Dictionary / Index U underpay: Meaning and Definition of Find definitions for: un•der•pay Pronunciation: (un"dur-pā'), [key] — -paid, -pay•ing. to pay less than is deserved or usual. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underpay (Thesaurus) underpass underperform 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