- (transitive) To carry out euthanasia on (a person or animal).
John decided to euthanize his dying cat.
- 2016, Chandrika Narayan, First child dies by euthanasia in Belgium, CNN:
A terminally ill minor has become the first child to be euthanized in Belgium since age restrictions were lifted in the country two years ago.
submit (a person or an animal) to euthanasia