noun
A (large) waterfall, specifically one flowing over the edge of a cliff.
(by extension) A flood of water; specifically, steep rapids in a river.
(figurative) An overwhelming downpour or rush; a flood.
(mechanics, chiefly historical) A type of governor used in single-acting steam engines, where a flow of water through an opening regulates the stroke.
(obsolete, also figurative) Synonym of waterspout (“a whirlwind that forms over water”).
verb
(intransitive) Of a river, etc.: to fall in the form of a waterfall.
(transitive, figurative, rare) To cause (something) to pour or rush like a waterfall.
noun
(obsolete, rare) Synonym of portcullis (“a gate in the form of a grating which is lowered into place at the gateway of a castle, a fort, etc.”); also, a window grating.
A clouding of the lens in the eye leading to a decrease in vision.
A tool used for breaking flax; a brake.