Ball1  —n. 1 sphere, esp. For use in a game. 2 a ball-shaped object; material in the shape of a ball (ball of snow, wool). B rounded part of the body (ball of the foot). 3 cannon-ball. 4 single delivery or pass of a ball in cricket, baseball, football, etc. 5 (in pl.) Coarse slang a testicles. B (usu. As int.) Nonsense. C = *balls-up. D courage, ‘guts’. —v. Form into a ball.  balls up coarse slang bungle; make a mess of. On the ball colloq. Alert. [old norse]