The Collaborative International Dictionary of English v.0.48:

Emplacement \Em*place"ment\, n. [Cf. F. emplacement.]
   A putting in, or assigning to, a definite place;
   localization; as, the emplacement of a structure.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

emplacement
    n 1: military installation consisting of a prepared position for
         siting a weapon
    2: the act of putting something in a certain place [syn:
       placement, location, locating, position,
       positioning, emplacement]