mare (mair-ee ormahr-ee), n. Hist. [Latin] The sea. See SEA.

mare clausum (mair-ee ormahr-ee klaw-z<<schwa>>m). [Latin “closed sea”] A sea or other body of navigable water that is under the jurisdiction of a particular nation and is closed to other nations.

mare liberum (mair-ee ormahr-ee lib-<<schwa>>r-<<schwa>>m orlI-b<<schwa>>r-<<schwa>>m). [Latin “free sea”] 1. A sea or other body of navigable water that is open to all nations. 2.FREEDOM OF THE SEAS.

[Blacks Law 8th]