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[is-mee-uh n]
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  1. of or relating to an isthmus.
  2. (initial capital letter) of or relating to the Isthmus of Corinth or the Isthmus of Panama.
  1. a native or inhabitant of an isthmus.

Origin of isthmian

1595–1605; < Latin isthmi(us) (< Greek ísthmios of a neck of land, equivalent to isthm(ós) neck + -ios adj. suffix) + -an
Related formstrans·isth·mi·an, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for isthmian

Historical Examples

  • The Isthmian games in honour of Neptune were also the invention of Theseus.

    Athens: Its Rise and Fall, Complete

    Edward Bulwer-Lytton

  • Milo the invincible, victor at Pisa, and in the Pythian and Isthmian combats.

  • He boarded this, and gave the captain a letter for the authorities of the isthmian port.

    Sea-Dogs All!

    Tom Bevan

  • In the Isthmiazusae two ladies described the spectacle of the Isthmian games.

  • Slight differences only are observable in the Isthmian physique.

British Dictionary definitions for isthmian


  1. relating to or situated in an isthmus


  1. relating to or situated in the Isthmus of Corinth or the Isthmus of Panama
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

Word Origin and History for isthmian


c.1600, from Latin isthmius, from Greek isthmios, from isthmos (see isthmus).

Online Etymology Dictionary, © 2010 Douglas Harper