/ Dictionary / Index L luminesce: Meaning and Definition of Find definitions for: lu•mi•nesce Pronunciation: (l"mu-nes'), [key] — -nesced, -nesc•ing. to exhibit luminescence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: luminesce (Thesaurus) lumine luminescence Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language