n. 1 a voluntary relinquishing of something valued. b thing so relinquished. c the loss entailed. 2 a slaughter of an animal or person or surrender of a possession, as an offering to a deity. b animal, person, or thing so offered. v. (cing) I give up (a thing) as a sacrifice. 2 (foil. by to) devote or give over to. 3 (also absol.) offer or kill as a sacrifice. sacrificial /11.1(o)1/ adj. [Latin: related to SACRED]