1.
China (the country); the People's Republic of China
The standard Japanese name for China.
2.
Chugoku region; western Honshu
The western region of Japan's main island Honshu, comprising Tottori, Shimane, Okayama, Hiroshima, and Yamaguchi prefectures. To avoid ambiguity with the country name, this region is sometimes called 中国地方.
Sense 1 (the country) is by far the more common everyday meaning. Sense 2 (the western Honshu region) often gets the disambiguating suffix 地方 when context might confuse it with the country.