basin

noun

• 1a bowl for washing, typically attached to a wall and having faucets connected to a water supply; a washbasin.

• 2a wide, round open container, especially one used for holding liquid.

• 3a natural depression on the earth’s surface, typically containing water:the Indian Ocean basin
• the tract of country that is drained by a river and its tributaries or drains into a lake or sea:the Amazon basin a drainage basin
• an enclosed area of water where vessels can be moored:a yacht basin
• Geology a circumscribed area within which the rock strata dip toward the center.