ma·re no·strum
| \ ˈmär-(ˌ)ā-ˈnō-strəm
\
\
Definition of mare nostrum
: a navigable body of water (such as a sea) that belongs to a single nation or is mutually shared by two or more nations
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“Mare nostrum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mare%20nostrum. Accessed 18 May. 2022.
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Time Traveler for mare nostrum
The first known use of mare nostrum was in 1921
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