Definition: Caspian refers to a river that flows through Europe, ending at Lake Barents in Russia. The word has multiple meanings: 1. The River Caspian originates from Lake Balduff on the Bosphorus Strait (in Turkey) and eventually ends where the Bosphorus meets the Sea of Azov. 2. It's also used for the name of a specific city located near Lake Barents, which is often referred to as "the capital city of Caspian".