Lewis Short
(verb) : circŭlor, ātus, 1, id..
* To form a circle (of men) about one's self, or to gather in a company or circle for conversation, * Cic. Brut. 54, 200: totis vero castris milites circulari et dolere, etc.,Caes. B. C. 1, 64.—Hence
* Of mountebanks, to collect people around one's self, Sen. Ep. 40, 3; 52, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary