(idiomatic) To refuse completely to do something, generally out of scorn.

(of a patient) Found to be dead upon arriving at hospital. / Found dead at a scene, upon the arrival of an emergency medical service (EMS) or the police. / (slang) Of a new item: received broken.

(simile) Entirely, unquestionably or certainly dead.

(sports) In a series of sporting fixtures, a match of which the result is irrelevant, the winner of the series having already been determined by earlier results.

(idiomatic) One who is in serious danger or trouble. / (idiomatic) A project that is doomed to failure from the start.

(physiology) The portion of the respiratory tract that is ventilated but not perfused by pulmonary circulation.

To lie very still, like a corpse. / To act as though defeated while awaiting a chance to attack.

present participle of dead stick

Media formats which are no longer used because they have become outmoded.

(transitive) To abandon a person or other living creature that is injured or otherwise incapacitated, assuming that the death of the one abandoned will soon follow.