C / clausūra
noun

clausūra

gen. clausūrae · gender feminine · decl. 1st
or , , claudo. *
A lock; bar; bolt
(Cf. claustra, I. A.) A lock, bar, bolt, Inscr. Orell. 2510.—
A castle; fort
(Cf. claustra, II. B.) A castle, fort (late Lat.), Cod. Just. 1, 27, 2, § 4; Cassiod. Var. 2, 5.