Lewis Short
circŭĭtĭo | circŭmĭtĭo (noun F) : (, Cic. Div. 2, 17, 40; 2, 61, 127; Liv. 3, 6, 9; Front. de Or. 3; Amm. 24, 2, 2), , circumeo.
* A going round; in milit. lang., the rounds: circuitio ac cura (vigiliarum) aedilium plebei erat. Liv. 3, 6, 9.
* A circuit: muni mentum fluminis circumitione vallatum, Amm 24, 2, 2.
* Meton. (abstr. pro concr.), a place for going round something, a way, passage, corridor, Vitr. 4, 4; 6, 3; 10, 19.
* A circumference, compass, Vitr. 1, 5; 2, 10.
Charlton T. Lewis, Charles Short, A Latin Dictionary