From Longman Dictionary of Contemporary Englishput something/somebody out of their miseryput something/somebody out of their miserya) informalWORRIED# to make someone stop feeling worried, especially by telling them something they are waiting to hear Go on, put them out of their misery and announce the winner. b) KILLto kill a sick or injured animal in order to end its suffering SYN put down I think you should put the poor creature out of its misery. → misery
