Source : Webster's Revised Unabridged Dictionary (1913)

Yager \Ya"ger\ (?; 277), n. [G. j["a]ger a hunter, from jagen to
   chase, hunt.] (Mil.)
   In the German army, one belonging to a body of light infantry
   armed with rifles, resembling the chasseur of the French
   army. [Written also {jager}.]