/ Dictionary / Index O overreact: Meaning and Definition of Find definitions for: o•ver•re•act Pronunciation: (ō"vur-rē-akt'), [key] — v.i. to react or respond more strongly than is necessary or appropriate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overreact (Thesaurus) overreach overrefine Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language