/ Dictionary / Index S security guard: Meaning and Definition of Find definitions for: secu'rity guard" Pronunciation: [key] a uniformed guard employed by a bank, airport, office building, etc., to maintain security. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Security Council security police Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language