The moral principle that a human being is entitled to end his/her own life or to undergo voluntary euthanasia.

(of a plant) To wither, particularly during the winter.

Without specifying a date (for a future event); indefinitely.

(idiomatic) To become extinct. / (idiomatic) To cease gradually.

(intransitive, idiomatic) To become less virulent or strong; to subside.

(idiomatic) Requiring a determined or desperate effort to avoid the consequences of failure.

(idiomatic) Conclusive action has been taken, so events will proceed in an irreversible manner; the point of no return has been passed; the future is determined; there are no more options.

plural of die-off

(chiefly attributive) One of the cutting tools and forming dies used by machine tools.

(intransitive) To die gradually or slowly. / (intransitive) To diminish or wane; to cease gradually. / (rare, obsolete, transitive) To cause to die; to do away with.