A wicketkeeper is the player in a cricket team who stands behind the wicket in order to stop balls that the batsman misses or to catch balls that the batsman hits.
wicketkeeper in British English
(ˈwɪkɪtˌkiːpə)
noun
cricket
the player on the fielding side positioned directly behind the wicket
wicketkeeper in American English
(ˈwɪkɪtˌkipər)
noun
Cricket
the fielder whose position is just behind the batsman's wicket