/ Dictionary / Index U ultrared: Meaning and Definition of Find definitions for: ul•tra•red Pronunciation: (ul"tru-red'), [key] — n. (not in technical use) infrared. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultrapure ultraright Related Content Daily Word Quiz: circumspect Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language