Anatolia is often considered to be synonymous with Asian Turkey, which comprises almost the entire country; its eastern and southeastern borders are widely taken to be the Turkish borders with neighboring Georgia, Armenia, Azerbaijan, Iran, Iraq, and Syria, in clockwise direction.
The Anatolian peninsula, also called Asia Minor, is bounded by the Black Sea to the north, the Mediterranean Sea to the south, the Aegean Sea to the west, and the Sea of Marmara to the northwest, which separates Anatolia from Thrace in Europe.
Traditionally, Anatolia is considered to extend in the east to an indefinite line running from the Gulf of Alexandretta to the Black Sea, coterminous with the Anatolian Plateau. This traditional geographical definition is used, for example, in the latest edition of Merriam-Webster's Geographical Dictionary, as well as the archeological community. Under this definition, Anatolia is bounded to the east by the Armenian Highlands, and the Euphrates before that river bends to the southeast to enter Mesopotamia. To the southeast, it is bounded by the ranges that separate it from the Orontes valley in Syria (region) and the Mesopotamian plain.