- [Roman Antiq] A level oblong space surrounded on three sides by seats of wood, earth, or stone, rising in tiers one above another, and divided lengthwise through the middle by a barrier around which the track or course was laid out. It was used for chariot races, games, and public shows.
- A circular inclosure for the exhibition of feats of horsemanship, acrobatic displays, etc. Also, the company of performers, with their equipage.
- Circuit; space; inclosure.(R)"The narrow circus of my dungeon wall." [Byron.]
Note: ☞ The Circus Maximus at Rome could contain more than 100,000 spectators.
Etymology: L. circus circle, ring, circus (in sense 1). See Circle, and cf. Cirque