The Collaborative International Dictionary of English v.0.48:

Slipper \Slip"per\, n.
   1. One who, or that which, slips.
      [1913 Webster]

   2. A kind of light shoe, which may be slipped on with ease,
      and worn in undress; a slipshoe.
      [1913 Webster]

   3. A kind of apron or pinafore for children.
      [1913 Webster]

   4. A kind of brake or shoe for a wagon wheel.
      [1913 Webster]

   5. (Mach.) A piece, usually a plate, applied to a sliding
      piece, to receive wear and afford a means of adjustment;
      -- also called shoe, and gib.
      [1913 Webster]

   Slipper animalcule (Zool.), a ciliated infusorian of the
      genus Paramecium.

   Slipper flower.(Bot.) Slipperwort.

   Slipper limpet, or Slipper shell (Zool.), a boat shell.
      [1913 Webster]