circus (n.)

14世纪末,指古罗马用于比赛等的大型、长方形、无顶的围墙,来自拉丁文 circus "环形、圆线",罗马人将其应用于表演和比赛的圆形竞技场和比赛用的椭圆形场地(尤其是 Circus Maximus ),来自或同源于希腊文 kirkos "圆圈、环形",可能来自PIE *kikro- ,是根 *sker- (2)"转弯、弯曲"的重写形式。形容词形式为circensian。

从1791年开始,指现代大型竞技场,用于表演马术、杂技等壮举,当时的意义扩展到表演公司本身和所给予的娱乐,因此是"巡回演出"(原 traveling circus ,1838年)。在第一次世界大战中扩展为军用飞机中队。意为"热闹的骚动,混乱的喧哗",出自1869年。

Picadilly Circus 和其他地名中的意义是来自18世纪初的意义"建筑物排列成环形",也有"环形路"的意思。

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Definitions of circus from WordNet
circus (n.)
a travelling company of entertainers; including trained animals;
he ran away from home to join the circus
circus (n.)
a performance given by a traveling company of acrobats, clowns, and trained animals;
the children always love to go to the circus
circus (n.)
a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment;
it was so funny it was a circus
Synonyms: carnival
circus (n.)
(antiquity) an open-air stadium for chariot races and gladiatorial games;
circus (n.)
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
Circus (n.)
a genus of haws comprising the harriers;
Synonyms: genus Circus