The definition of a living will is a legally enforceable directive that you issue indicating whether you want extreme measures taken to save your life in the event that you are seriously ill and unable to make medical decisions.
An example of a living will is a document you right saying that you do not want to be put on life support or have other extreme measures taken to save your life.
living will definition by Webster's New World
a document, legal in some states, directing that all measures to support life be ended if the signer should be dying of an incurable condition
living will definition by American Heritage Dictionary
A document in which the signer states his or her wishes regarding medical treatment, especially treatment that sustains or prolongs life by extraordinary means, for use if the signer becomes mentally incompetent or unable to communicate.
A written document in which a person indicates the type of medical treatment that is desired. For example, a living will might specify that no life-sustaining measures be used to prolong a terminal condition.
document that lets the creator state his or her preferences about what type of
medical treatment should be given in the event that he or she becomes
terminally ill or severely injured and is unable to declare his or her
intentions. A living will dictates whether the person is to be fed
intravenously or to be put on a respirator, among other health-care directives.
document signed by an individual directing manner in which he wishes to be
medically treated if in a vegetative or terminal state, designed to give
guidance to loved ones and health care providers as to the desires of an
individual if he is no longer able to properly communicate such desires.