a lake in W central Cambodia, linked with the Mekong River by the Tonle Sap River. Area: (dry season) about 2600 sq km (1000 sq miles); (rainy season) about 10 000 sq km (3860 sq miles)
Tonle Sap in American English
(ˈtɑnleɪ ˈsɑp; ˈsæp)
1.
lake in central Cambodia: area varies from 1,000-9,500 sq mi (2,590-24,605 sq km) according to season
2.
river flowing from this lake into the Mekong River: c. 70 mi (113 km)