circus
noun
1.
a travelling company of entertainers; including trained animals
2.
a performance given by a traveling company of acrobats, clowns, and trained animals
3.
a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment
4.
(antiquity) an open-air stadium for chariot races and gladiatorial games
5.
an arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tent