(idiomatic) exactly at

present participle of dead

Alternative form of dead on

Third-person singular simple present indicative form of dead

(mining) The substances that enclose the ore on every side.

(US, slang) A piece of US paper currency. / Used other than figuratively or idiomatically: see dead, president.

Alternative spelling of deadbeat

A method of estimating the position of a ship or aircraft by applying estimates of the distance and direction travelled to a previously known position. In respect to ships/boats, it excludes the effect of wind and current on the vessel. Compare with estimated position. Abbreviation: DR

(idiomatic) A street or path that goes nowhere or is blocked on one end. / A position that offers no hope of progress. / A split end in the hair.

(idiomatic, broadcasting) An unintended interruption in a broadcast during which nothing is transmitted: a silent period on radio or a silent period with no picture on television.