an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles; "the equator is the boundary between the northern and southern hemispheres"
a circle dividing a sphere or other surface into two usually equal and symmetrical parts
any circular or rotating mechanism; "the machine punched out metal circles"
a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra; "they had excellent seats in the dress circle"
ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point; "he calculated the circumference of the circle"
something approximating the shape of a circle; "the chairs were arranged in a circle"
performance given by a traveling company of acrobats clowns and trained animals; "the children always love to go to the circus"
a 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"
a genus of haws comprising the harriers
an 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"
(antiquity) an open-air stadium for chariot races and gladiatorial games
a travelling company of entertainers; including trained animals; "he ran away from home to join the circus"