1. of, relating to, or located on an isthmus
2. of or relating to the Isthmus of Corinth or the ancient Isthmian Games held there
Usage: historical

Examples

• The isthmian region connects the two larger landmasses.
• Panama’s isthmian location made it ideal for a canal.
• The isthmian games were held every two years in ancient Greece.
• Isthmian transportation routes have been crucial throughout history.
• The narrow isthmian passage created a natural bottleneck.
• Ancient athletes competed in the isthmian festivals at Corinth.