A framework, trough, or tube, upon or through which objects are made to slide from a higher to a lower level, or through which water passes to a wheel.
A waterfall or rapid.
The pen in which an animal is confined before being released in a rodeo.
A parachute.
A spinnaker.
To parachute.
An adjustable dam placed across a river to regulate the flow of water downstream.
A fence placed across a river to catch fish.