A1any object in the shape of a sphere, especially one used as a toy by children or in various sports such as tennis and football: a beach/golf/tennis ballJust try to concentrate on hitting the ball.The kitten curled itself into a ball (= the shape of a ball).Spherical, circular and annular objectsGeometrical shapesToys and dollsA1a long piece of thread that has been rolled into a ball: a ball of string/woolSpherical, circular and annular objectsGeometrical shapes›the rounded part of your foot or thumb where the toes join the foot and the thumb joins the handThe footThe hand