Source : Webster's Revised Unabridged Dictionary (1913)

Sweeper \Sweep"er\, n.
   One who, or that which, sweeps, or cleans by sweeping; a
   sweep; as, a carpet sweeper.

         It is oxygen which is the great sweeper of the economy.
                                                  --Huxley.

Source : WordNet®

sweeper
     n 1: an employee who sweeps (floors or streets etc.)
     2: a cleaning device with revolving brushes that pick up dirt
        as the device is pushed over a carpet [syn: {carpet
        sweeper}]
     3: little-known nocturnal fish of warm shallow seas with an
        oblong compressed body