1(also Balkan Mountains)A range of mountains stretching eastwards across Bulgaria from the Serbian frontier to the Black Sea. The highest peak is Botev Peak (2,375 m; 7,793 ft).
2The countries occupying the part of south-eastern Europe lying south of the Danube and Sava Rivers, forming a peninsula bounded by the Adriatic and Ionian Seas in the west, the Aegean and Black Seas in the east, and the Mediterranean in the south.
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