circus (Noun) — A genus of haws comprising the harriers.
circus (Noun) — A travelling company of entertainers; including trained animals. ex. "he ran away from home to join the circus"
circus (Noun) — A performance given by a travelling company of acrobats, clowns, and trained animals. ex. "the children always love to go to the circus"
circus (Noun) — A frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment. ex. "it was so funny it was a circus"
circus (Noun) — (antiquity) an open-air stadium for chariot races and gladiatorial games.
circus (Noun) — An arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tent. ex. "they used the elephants to help put up the circus"