/ Dictionary / Index C cross-reaction: Meaning and Definition of Find definitions for: cross-re•ac•tion Pronunciation: (krôs'rē-ak'shun kros'-), [key] — n. an immunologic reaction between a given antigen and an antibody or lymphokine that is specific for a different antigen resembling the first one. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cross-react cross-refer Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language