From The Collaborative International Dictionary of English v.0.48:
Stringer \String"er\ (str[i^]ng"[~e]r), n.
1. One who strings; one who makes or provides strings,
especially for bows.
[1913 Webster]
Be content to put your trust in honest stringers.
--Ascham.
[1913 Webster]
2. A libertine; a wencher. [Obs.] --Beau. & Fl.
[1913 Webster]
3. (Railroad) A longitudinal sleeper.
[1913 Webster]
4. (Shipbuilding) A streak of planking carried round the
inside of a vessel on the under side of the beams.
[1913 Webster]
5. (Carp.) A long horizontal timber to connect uprights in a
frame, or to support a floor or the like.
[1913 Webster]
6. (Newspapers) A reporter or correspondent who works for a
news agency on a part-time basis, especially one covering
local news for a newspaper published in a different area;
-- called also string correspondent.
[PJC]
7. (Aviation) a longitudinal supporting structure to
reinforce the skin of an airplane fuselage.
[PJC]