mare clausum
ma·re clau·sum
noun \ˈmär-(ˌ)ā-ˈklau̇-səm, -ˈklȯ-\Definition of MARE CLAUSUM
: a navigable body of water (as a sea) that is under the jurisdiction of one nation and is closed to other nations
Origin of MARE CLAUSUM
New Latin, literally, closed sea
First Known Use: 1652
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