the ancient name of a country in the S.E. of Europe, now forming part of European Turkey. In the earliest times the name was used in a very vague sense, and applied to the whole region north of the Ægean Sea, including Macedonia and even Scythia; but when this country became better known to the Greeks, Thrace was confined within narrower and more definite limits. It was bounded on the N. by the Danube, E. by the Euxine and the Bosphorus, S. by the Propontis and the Ægean, and W. by the Strymon, or, at a later period, by the Nestus, which separated it from Macedonia. After the Roman conquest; its size was still further reduced by the chain of Haemus being made its northern boundary. It corresponds partly with the modern Rumili, which also includes part of Macedonia and Thessaly. (See Rumili.)