A wide bin-like entry to feed large bulks of solid matter into a machine. It is open above, and tapers, being thinner at the bottom where it feeds into the mechanism.
In biology, the immature form or nymph of a locust. Large groups of these nymphs are called hopper bands.
In politics, in the United States House of Representatives, the Hopper is the box which sits on the House Clerk's desk, into which a bill or resolution is dropped for introduction.
In agriculture, a hopper on a combine is a tank or bin where the harvested grain is temporarily stored until it is unloaded to a truck or grain cart.
A type of goods railway wagon for carrying bulk solids.
