an agricultural region extending from the Levant to Iraq.
an area in the Middle and Near East: formerly fertile, now partly desert.
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British Dictionary definitions for fertile crescent
an area of fertile land in the Middle East, extending around the Rivers Tigris and Euphrates in a semicircle from Israel to the Persian Gulf, where the Sumerian, Babylonian, Assyrian, Phoenician, and Hebrew civilizations flourished
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