Source : Webster's Revised Unabridged Dictionary (1913)

Ejector \E*ject"or\, n.
   That part of the mechanism of a breech-loading firearm which
   ejects the empty shell.

Ejector \E*ject"or\, n.
   1. One who, or that which, ejects or dispossesses.

   2. (Mech.) A jet jump for lifting water or withdrawing air
      from a space.

   {Ejector condenser} (Steam Engine), a condenser in which the
      vacuum is maintained by a jet pump.

Source : WordNet®

ejector
     n 1: a person who ousts or supplants someone else [syn: {ouster}]
     2: a mechanism in a firearm that ejects the empty shell case
        after firing [syn: {cartridge ejector}]