/ Dictionary / Index T theftproof: Meaning and Definition of Find definitions for: theft•proof Pronunciation: (theft'prf"), [key] — n. safe from theft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. theft insurance thegn Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language