/ Dictionary / Index E euthanize: Meaning and Definition of Find definitions for: eu•tha•nize Pronunciation: (y'thu-nīz"), [key] — -nized, -niz•ing. to subject to euthanasia: to euthanize injured animals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. euthanasia euthenics Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language