Oblast (Czech: oblast, Slovak: oblasť, , , Bulgarian: о́бласт) refers to a subnational entity in some countries. Possible English translations of the word are area, zone, province or region. In terms of administrative subdivisions, the latter two translations may be inaccurate or confusing.
The oblast in Eastern Europe and Russian Federation geographic context is a subnational entity of Bulgaria, the Russian Federation, Ukraine, and the now-defunct Soviet Union. Official terms in other successor states of the Soviet Union differ, but some still use a cognate of the Russian term, e.g. voblast (voblasts, voblasts' ) is used for provinces of Belarus, and oblys (plural: oblystar) for provinces of Kazakhstan.

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