1 Mil. a tr. cause (troops) to spread out from a column into a line. b intr. (of troops) spread out in this way.
2 tr. bring (arguments, forces, etc.) into effective action.
Derivatives:
deployment n.
Etymology: F deacuteployer f. L displicare (as DIS-, plicare fold) & LL deplicare explain
Useful english dictionary. 2012.