mare clausum
noun
ma·re clau·sum
ˈmär-(ˌ)ā-ˈklau̇-səm 
-ˈklȯ-
-ˈklȯ-
: a navigable body of water (such as a sea) that is under the jurisdiction of one nation and is closed to other nations
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“Mare clausum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mare%20clausum. Accessed 31 Oct. 2024.
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