Sound asleep. / Unconscious. / Without social relationships or communication; without emotional or tangible bonds to others.

(Britain) Alternative spelling of dead center

Synonym of dead point: the position at which a crank is in a direct line with a connecting rod. / A nonrevolving center in a lathe. / (idiomatic) The exact center.

Alternative form of dead-center

Alternative form of dead-center

Alternative spelling of brain-dead

(medicine, not comparable) Having an irreversible loss of brain function and cessation of brain activity. / (colloquial) Having no useful thoughts; stupid; ditzy.

Used other than figuratively or idiomatically: see dead, men. / (nautical) The ends of reefs left flapping instead of being tucked out of sight when a sail has been furled.

(nautical) The eddying water under a slow-moving ship's counter, or a similar area of stationary fluid or gas in advance of a concave angle.

Made of or pertaining to paper, especially as opposed to a digital alternative.