/ Dictionary / Index N NOT circuit: Meaning and Definition of Find definitions for: NOT' cir"cuit Pronunciation: (not), [key] a circuit that is energized when its input is not. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. notched collar note Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language