Source : Webster's Revised Unabridged Dictionary (1913)

Enlistment \En*list"ment\, n.
   1. The act or enlisting, or the state of being enlisted;
      voluntary enrollment to serve as a soldier or a sailor.

   2. The writing by which an enlisted man is bound.

Source : WordNet®

enlistment
     n : a period of time spent in military service [syn: {hitch}, {term
         of enlistment}, {tour of duty}, {duty tour}, {tour}]