(1) The land between the Tigris and Euphrates; site of several ancient civilizations; part of what is now known as Iraq
WiktionaryText
Etymology
From < + , because Mesopotamia is located between rivers Euphrates and Tigris.
Proper noun
A region in Southwest Asia spanning from the rivers Euphrates and Tigris that is the site of one of the most ancient civilizations in the history of man.
The British Mandate of Mesopotamia, a League of Nationsmandate from 1920 to 1932 that was the precursor to the independent state of Iraq.
