\Hop"per\, n. [See 1st {Hop}.]
1. One who, or that which, hops.
2. A chute, box, or receptacle, usually funnel-shaped with an
   opening at the lower part, for delivering or feeding any
   material, as to a machine; as, the wooden box with its
   trough through which grain passes into a mill by joining
   or shaking, or a funnel through which fuel passes into a
   furnace, or coal, etc., into a car.
3. (Mus.) See {Grasshopper}, 2.
4. pl. A game. See {Hopscotch}. --Johnson.
5. (Zo["o]l.)
   (a) See {Grasshopper}, and {Frog hopper}, {Grape hopper},
       {Leaf hopper}, {Tree hopper}, under {Frog}, {Grape},
       {Leaf}, and {Tree}.
   (b) The larva of a cheese fly.
6. (Naut.) A vessel for carrying waste, garbage, etc., out to
   sea, so constructed as to discharge its load by a
   mechanical contrivance; -- called also {dumping scow}.
{Bell and hopper} (Metal.), the apparatus at the top of a
   blast furnace, through which the charge is introduced,
   while the gases are retained.
{Hopper boy}, a rake in a mill, moving in a circle to spread
   meal for drying, and to draw it over an opening in the
   floor, through which it falls.
{Hopper closet}, a water-closet, without a movable pan, in
   which the receptacle is a funnel standing on a draintrap.
{Hopper cock}, a faucet or valve for flushing the hopper of a
   water-closet.