/ Dictionary / Index U underbuy: Meaning and Definition of Find definitions for: un•der•buy Pronunciation: (un"dur-bī'), [key] — v., -bought, -buy•ing. —v.t. to buy more cheaply than (another). to buy at less than the actual value. —v.i. to buy an insufficient quantity, as of supplies or stock in trade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. underbudgeted undercapitalize Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language