/ Dictionary / Index O orexis: Meaning and Definition of Find definitions for: o•rex•is Pronunciation: (ô-rek'sis, ō-rek'-), [key] — n. Psychol. the affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -orexia Orfeo ed Euridice* 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