/ Dictionary / Index U undercool: Meaning and Definition of Find definitions for: un•der•cool Pronunciation: (un"dur-kl'), [key] — v.t. to cool less than necessary for a given process or purpose. to supercool. to cool (molten metal) without forming crystals to a temperature below that at which crystallization normally takes place: Metal must be absolutely still to be undercooled. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undercompensate undercount Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language