/ Dictionary / Index A alarm clock: Meaning and Definition of Find definitions for: alarm' clock" Pronunciation: [key] a clock with a bell or buzzer that can be set to sound at a particular time, as to awaken someone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alarm alarming Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language