/ Dictionary / Index S stoplight: Meaning and Definition of Find definitions for: stop•light Pronunciation: (stop'līt"), [key] — n. a taillight that lights up as the driver of a vehicle steps on the brake pedal to slow down or stop. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stoplight (Thesaurus) stop knob stop-limit order Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language