The aim of the bowler's team is to get each batsman out (this is a wicket, or a dismissal). Dismissals are achieved in a variety of ways. The most direct way is for the bowler to bowl the ball in such a way that it evades the batsman's guard and hits the stumps, dislodging the bails. While the batsmen are attempting a run, the fielders may attempt to knock the bails off either set of stumps with the ball before the batsman nearer to that set of stumps has reached the crease. Other ways for the fielding side to dismiss a batsman include catching a struck ball before it touches the ground. Once the batsmen are not attempting to score any more runs, the ball is "dead" and is bowled again (each attempt at bowling the ball is a ball or a delivery).
The game is divided into overs of six (legal) balls. At the end of an over, the batting and bowling ends will be swapped, and the bowler replaced by another member of the fielding side. The two umpires also change positions at this time, and sometimes the fielding positions are rearranged.