a (round or oval) place with seats on all sides, used for a show of performing animals, acrobats etc
fair with entertainment
Cases of word usage
1) a person (especially in a circus or pantomime) who makes a living by dressing up and doing foolish or funny things (clown)
2) a circular band of wood or metal as put around a barrel etc; a large ring with paper stretched over it through which circus rides and animals jump (hoop)
3) a company of actors, members of a circus etc (troupe)