The joint next above the hock, and near the flank, in the hind leg of the horse and allied animals; the joint corresponding to the knee in man; -- called also stifle joint. See Illust. under Horse.(noun)
To stop the breath of by crowding something into the windpipe, or introducing an irrespirable substance into the lungs; to choke; to suffocate; to cause the death of by such means; as, to stifle one with smoke or dust.(verb)
source: webster1913
To die by reason of obstruction of the breath, or because some noxious substance prevents respiration.(verb)