'Expeditionary' definitions:

Definition of 'expeditionary'

From: WordNet
adjective
(used of military forces) designed for military operations abroad; "the French expeditionary force in Indochina"

Definition of 'Expeditionary'

From: GCIDE
  • Expeditionary \Ex`pe*di"tion*a*ry\, a. Of or pertaining to an expedition; as, an expeditionary force. [1913 Webster]