saeptĭo

ōnis, f.

saepio

I. Prop., a hedging or fencing in, enclosing (post-Aug.), Vitr. 5, 12, 5; 6, 11 (8), 5.—
II. Meton., an enclosing with a wall, etc.; with obj. gen.: urbis, Vop. Aur. 12.
Lewis & Short
A Latin Dictionary, 1879
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