hoop

a  : a circular object : a large ring

b  : a large metal ring used for holding together the sides of a barrel

c  : a large ring used by performers or for play — see also hula-hoop

a  : a metal ring that the ball must go through in order to score points

b  informal : a successful shot

c  US, informal : basketball — usually plural

: an arch through which the ball must be hit in the game of croquet : wicket