/ Dictionary / Index S safety lock: Meaning and Definition of Find definitions for: safe'ty lock" Pronunciation: [key] a lock designed to prevent picking. safety (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. safety lintel safety man Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language