/ Dictionary / Index C cathexis: Meaning and Definition of Find definitions for: ca•thex•is Pronunciation: (ku-thek'sis), [key] — pl. -thex•es the investment of emotional significance in an activity, object, or idea. the charge of psychic energy so invested. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cathexis (Thesaurus) cathetus Cathie Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language