Learner's definition of CIRCUS
a traveling show that is often performed in a tent and that typically includes trained animals, clowns, acrobats, etc.
He worked for a small circus.
We're going to the circus.
She always wanted to join the circus. [=to become a performer in a circus]
— often used before another noun
a situation or event that is very busy, lively, and confusing and that attracts a lot of attention
— usually singular
see also three-ring circus
a circular area where several streets meet
— usually used in proper names
a large outdoor theater in ancient Rome where shows and sports events were held