verb (used with object), eu·tha·nized, eu·tha·niz·ing.

to subject to euthanasia: to euthanize injured animals.

Nearby words

  1. eutectoid,
  2. eutelegenesis,
  3. euterpe,
  4. euthanasia,
  5. euthanise,
  6. euthenics,
  7. euthenist,
  8. eutherian,
  9. euthermic,
  10. euthymia

Also eu·than·a·tize [yoo-than-uh-tahyz] /yuˈθæn əˌtaɪz/; especially British, eu·tha·nise, eu·than·a·tise.

Origin of euthanize

First recorded in 1960–65; euthan(asia) + -ize Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for euthanize

  • The three-drug formula, Alper writes, is “less reliable, and therefore less humane, than the method used to euthanize animals.”

    Executed Like a Dog|Ben Crair|November 13, 2010|DAILY BEAST

British Dictionary definitions for euthanize


euthanise Austral euthanaze or euthanase (ˈjuːθəˌneɪz)


(tr) to kill (a person or animal) painlessly, esp to relieve suffering from an incurable illness

Word Origin for euthanize

C20: back formation from euthanasia

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for euthanize



by 1915, in place of earlier and etymologically correct euthanatize (1873); see euthanasia + -ize. Related: Euthanized; euthanizing.

Online Etymology Dictionary, © 2010 Douglas Harper