Left-handed  adj. 1 naturally using the left hand for writing etc. 2 (of a tool etc.) For use by the left hand. 3 (of a blow) struck with the left hand. 4 a turning to the left. B (of a screw) turned anticlockwise to tighten. 5 awkward, clumsy. 6 a (of a compliment) ambiguous. B of doubtful sincerity.  left-handedly adv. Left-handedness n.