/ Dictionary / Index L lustrate: Meaning and Definition of Find definitions for: lus•trate Pronunciation: (lus'trāt), [key] — -trat•ed, -trat•ing. to purify by a propitiatory offering or other ceremonial method. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lustrate (Thesaurus) lustral lustre Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language