What is "hit the ball twice"

adv. In accordance with this rule against hitting the ball a second time. n. (context cricket English) A rule ("law" in cricket) which when invoked results in the dismissal of a batsman (out), whereby the batsman has deliberately hit the ball with his bat a second time for a reason other than to protect his wicket.

Hit the ball twice, or "double-hit", is a method of dismissal in the sport of cricket.