decampment

from WordNet (r) 3.0 (2006)
decampment
    n 1: the act of running away secretly (as to avoid arrest) [syn:
         {abscondment}, {decampment}]
    2: breaking camp
    
from The Collaborative International Dictionary of English v.0.48
Decampment \De*camp"ment\, n. [Cf. F. d['e]campement.]
   Departure from a camp; a marching off.
   [1913 Webster]
    

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