Dead  —adj. 1 no longer alive. 2 colloq. Extremely tired or unwell. 3 numb (fingers are dead). 4 (foll. By to) insensitive to. 5 no longer effective or in use; extinct. 6 (of a match, coal, etc.) Extinguished. 7 inanimate. 8 a lacking force or vigour. B (of sound) not resonant. 9 quiet; lacking activity (dead season). 10 (of a microphone, telephone, etc.) Not transmitting sounds. 11 (of a ball in a game) out of play. 12 abrupt, complete (come to a dead stop; a dead calm; dead certainty). —adv. 1 absolutely, completely (dead on target; dead tired). 2 colloq. Very, extremely (dead easy). —n. Time of silence or inactivity (dead of night).  as dead as the (or a) dodo entirely obsolete. Dead to the world colloq. Fast asleep; unconscious. [old english]