dead set

[ ded set for 1, 2; ded set for 3 ]
/ ˈdɛd ˈsɛt for 1, 2; ˈdɛd ˌsɛt for 3 /

adjective

firmly decided or determined; resolved: His family was dead set against the marriage.

noun

a serious or determined attempt; firm effort: He made a dead set at winning the championship.
Hunting. the stiff posture assumed by a hunting dog in indicating the presence and location of game.

Origin of dead set

An Americanism dating back to 1840–50

Example sentences from the Web for dead set

British Dictionary definitions for dead set