Source : Webster's Revised Unabridged Dictionary (1913)

Stringer \String"er\ (str[i^]ng"[~e]r), n.
   1. One who strings; one who makes or provides strings,
      especially for bows.

            Be content to put your trust in honest stringers.
                                                  --Ascham.

   2. A libertine; a wencher. [Obs.] --Beau. & Fl.

   3. (Railroad) A longitudinal sleeper.

   4. (Shipbuilding) A streak of planking carried round the
      inside of a vessel on the under side of the beams.

   5. (Carp.) A long horizontal timber to connect uprights in a
      frame, or to support a floor or the like.

Source : WordNet®

stringer
     n 1: a member of a squad on a team; "a first stringer"; "a second
          stringer"
     2: a worker who strings; "a stringer of beads"
     3: brace consisting of a longitudinal member to strengthen a
        fuselage or hull
     4: a long horizontal timber to connect uprights