/ Dictionary / Index C chain-react: Meaning and Definition of Find definitions for: chain-re•act Pronunciation: (chān'rē-akt"), [key] — v.i. to undergo or produce a chain reaction: Riots chain-reacted from one area to another in the city. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chain pump chain-reacting pile Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language