Source : Webster's Revised Unabridged Dictionary (1913)

Stager \Sta"ger\, n.
   1. A player. [R.] --B. Jonson.

   2. One who has long acted on the stage of life; a
      practitioner; a person of experience, or of skill derived
      from long experience. ``You will find most of the old
      stagers still stationary there.'' --Sir W. Scott.

   3. A horse used in drawing a stage. [Colloq.]

Source : WordNet®

stager
     n 1: someone who supervises the physical aspects in the
          production of a show and who is in charge of the stage
          when the show is being performed [syn: {stage manager}]
     2: an experienced person who has been through many battles;
        someone who has given long service [syn: {veteran}, {old-timer},
         {oldtimer}, {old hand}, {warhorse}, {old stager}]