(nautical) The condition of a perfectly flat sea with no waves and no wind.

plural of dead ball

(US, idiomatic) With sufficient evidence to establish responsibility definitively.

(idiomatic) Something that discloses, usually unintentionally, a fact or an intention.

(idiomatic) Utterly dead.

(uncountable, idiomatic, management) Personnel no longer contributing to an organization. / Used other than figuratively or idiomatically: see dead, wood.

plural of dead-set

plural of dead set

plural of dead president

A particularly sound sleep / The first sleep of the night in a biphasic sleep pattern, before the watch.