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mare clausum(ˈmɑːreɪ ˈklaʊsʊm)
(Law) law a sea coming under the jurisdiction of one nation and closed to all others
[Latin: closed sea]
ma•re clau•sum(ˈmɛər i ˈklɔ səm, ˈklaʊ-, ˈmɑr eɪ)
a body of navigable water under the sole jurisdiction of one nation.
[< Latin: closed sea]
a body or stretch of navigable water which is under the jurisdiction of a particular nation. Cf. mare liberum.See also: Sea