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

(psychology) A desire, especially subconscious, for the death of oneself or of someone else.

Dead branches or wood on a tree, or coarse woody debris. / People or things judged to be superfluous to an organization or project. / Money not realized by exiting a winning pump trade too early.

Alternative spelling of brain-dead

(medicine) An irreversible loss of brain function and cessation of brain activity.

To take part in a battle in which the winner is the sole survivor.