caspian countries

noun

1. The countries that border the Caspian Sea: Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan.

   B1

   plural

   • "The Caspian countries are working together to protect the sea's environment."B1
   • "Oil and gas reserves make the Caspian countries important to the global energy market."B2
   • "Negotiations among the Caspian countries over maritime boundaries have been ongoing for decades."C1