From Longman Dictionary of Contemporary Englishliving willˌliving ˈwill noun [countable] SCLMa document explaining what medical or legal decisions someone should make if you become so ill that you cannot make those decisions yourself
Examples from the Corpus
living will• Living Wills A living will is a record of your wishes regarding medical treatment at the end of life.• Further information and advice on making a living will is available from the Trust's Advice Centre or Immunity.From Longman Business Dictionaryliving willˌliving ˈwill a document explaining what medical or legal decisions should be made if you become too ill to make those decisions yourself → will 