/ Dictionary / Index S shutoff: Meaning and Definition of Find definitions for: shut•off Pronunciation: (shut'ôf", -of"), [key] — n. an object or device that shuts (something) off: the automatic shutoff on a heater. an act or instance of shutting off something, as an opening, a flow, or a service: a shutoff of electric power due to unpaid bills. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. shut-in shutout 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