The Collaborative International Dictionary of English v.0.48:

Dislodgment \Dis*lodg"ment\, n. [Cf. F. d['e]logement, OF.
   deslogement.]
   The act or process of dislodging, or the state of being
   dislodged.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dislodgment
    n 1: forced removal from a position of advantage [syn:
         dislodgment, dislodgement]