/ Dictionary / Index C caffeinism: Meaning and Definition of Find definitions for: caf•fein•ism Pronunciation: (ka-fē'niz-um, kaf'ē-niz"-, kaf'ē-u-), [key] — n. chronic toxicity caused by excessive intake of caffeine, characterized by anxiety, irritability, palpitations, insomnia, and digestive disturbances. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: caffeinism (Thesaurus) caffeine caffè latte* Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language