Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A navigable body of water, such as a sea, that is open to navigation by vessels of all nations.

from the GNU version of the Collaborative International Dictionary of English

  • n. A navigable body of water to which all nations have equal access; the opposite of mare clausum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. (free sea) a navigable body of water to which all nations have equal access

Etymologies

New Latin mare līberum : Latin mare, sea + Latin līberum, free.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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