Pronunciation: (bā'sun),[key] —n. 1. a circular container with a greater width than depth, becoming smaller toward the bottom, used chiefly to hold water or other liquid, esp. for washing.
2. any container of similar shape, as the pan of a balance.
3. the quantity held by such a container: We need another basin of water to dilute the mixture. 4. a natural or artificial hollow place containing water.
5. a partially enclosed, sheltered area along a shore, often partly man-made or dredged to a greater depth, where boats may be moored: a yacht basin. 6. Geol.an area in which the strata dip from the margins toward a common center.
7. Physical Geog. a. a hollow or depression in the earth's surface, wholly or partly surrounded by higher land: river basin. b. See drainage basin. 8. Bot.the depression in an apple, pear, or other pome at the end opposite the stem.