A hollow or depression in the ground, esp. one in which water stands; spec. a natural or artificial basin in which salt is obtained by…

A hole from which peats have been cut, esp. one in which water has collected.

A cavity in the bed of a river. Obsolete.

A hollow receptacle, natural or artificial, containing water. spec. a submarine hollow or cavity.

south-west. U.S. A rock hollow where water is retained; hence, any temporary or intermittent pool.

A sinking, subsidence; concrete a depression in the ground which collects water, esp. one caused by mining excavations. local.

(a) Engineering (in a steam boiler) a compartment or division containing a portion of water; (b) a natural depression or cavity in which water…

(a) a cave or tunnel; (b) Australian a natural depression in a rock that catches water; = gnamma hole, n.