Definitions for: Mare Clausum

[n] (closed sea) a navigable body of water under the jurisdiction of a single nation

Webster (1913) Definition: Ma"re clau"sum [L.] (Internat. Law)
Lit., closed sea; hence, a body of water within the separate
jurisdiction of the nation; -- opposed to open sea, the
water open to all nations and over which no single nation has
special control.

See Also: waterway