Open English Wordnet
Nouns
(n)circusa travelling company of entertainers; including trained animals“he ran away from home to join the circus” (n)circusa performance given by a traveling company of acrobats, clowns, and trained animals“the children always love to go to the circus” (n)circus, carnivala frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment“it was so funny it was a circus”,
“the whole occasion had a carnival atmosphere” (n)circus(antiquity) an open-air stadium for chariot races and gladiatorial games (n)circusan arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tent“they used the elephants to help put up the circus” 