in ancient Greece, a mountain pass in Locris, near an inlet of the Aegean Sea: scene of a battle (480 ) in which the Persians under Xerxes destroyed a Spartan army under Leonidas
See Thermopylae in American Heritage Dictionary 4
(thər-mŏpˈə-lē)
A narrow pass of east-central Greece. It was the site of an unsuccessful Spartan stand against the Persians in 480 B.C.