/ Dictionary / Index R reactive component: Meaning and Definition of Find definitions for: reac'tive compo'nent Pronunciation: [key] — Elect. Elect. the component in an alternating-current circuit that does not contribute power because it is 90° out of phase with the voltage or current. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reactive reactive depression Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language