From WordNet (r) 3.0 (2006):
ball
n 1: round object that is hit or thrown or kicked in games; "the
ball travelled 90 mph on his serve"; "the mayor threw out
the first ball"; "the ball rolled into the corner pocket"
2: a solid projectile that is shot by a musket; "they had to
carry a ramrod as well as powder and ball" [syn: musket
ball, ball]
3: an object with a spherical shape; "a ball of fire" [syn:
ball, globe, orb]
4: the people assembled at a lavish formal dance; "the ball was
already emptying out before the fire alarm sounded"
5: one of the two male reproductive glands that produce
spermatozoa and secrete androgens; "she kicked him in the
balls and got away" [syn: testis, testicle, orchis,
ball, ballock, bollock, nut, egg]
6: a spherical object used as a plaything; "he played with his
rubber ball in the bathtub"
7: United States comedienne best known as the star of a popular
television program (1911-1989) [syn: Ball, Lucille Ball]
8: a compact mass; "a ball of mud caught him on the shoulder"
[syn: ball, clod, glob, lump, clump, chunk]
9: a lavish dance requiring formal attire [syn: ball,
formal]
10: a more or less rounded anatomical body or mass; "the ball at
the base of the thumb"; "he stood on the balls of his feet"
11: the game of baseball
12: a pitch that is not in the strike zone; "he threw nine
straight balls before the manager yanked him"
v 1: form into a ball by winding or rolling; "ball wool"