[mair-ee klaw-suh m, mahr-ey; Latin mah-re klou-soo m]
a body of navigable water under the sole jurisdiction of a nation.
Compare mare liberum.
Origin of mare clausum
1645–55; < Latin: closed sea
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin for mare clausum
Latin: closed sea
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012