Definition of "mare nostrum" []

• A navigable body of water, such as a sea, that is under the jurisdiction of one nation or that is shared by two or more nations. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.