(colloquial) That is yesterday's news; everybody knows that already.

simple past tense and past participle of self-deal

Dying; moribund; terminally ill. / Doomed to die soon; / Alive

(music, historical) An Aztec instrument, sometimes shaped like a skull, that when blown produces a human-like shriek.

plural of death whistle

plural of dead room

anechoic chamber

plural of dead fish

(cinematography, sound recording) A furry coverlet placed over a microphone to muffle the sound of wind.

(pathology, historical, dated) Synonym of Spanish influenza