/,ju:θə'neɪzɪə; [US] -'neɪʒə; ,juθə`neʒə/
n [U] (bringing about of a) gentle and painless death for a person suffering from a painful incurable disease, extreme old age, etc 安乐死（术）; 安死术
*It is against the law for doctors to practise euthanasia, ie to kill patients to prevent suffering. 医生施行安死术是违法的.

n[U]
[Date: 1600-1700; Language: Greek;Origin:'easy death', from thanatos 'death']
the deliberate killing of a person who is very ill and going to die, in order to stop them suffering