one of the great national festivals of ancient Greece, held every two years on the Isthmus of Corinth.
Origin of Isthmian Games
First recorded in 1595–1605
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British Dictionary definitions for isthmian games
a Panhellenic festival celebrated every other year in ancient Corinth
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