- to spread out (troops, etc.) so as to form a wider front
- to station or place (forces, equipment, etc.) in accordance with a plan
- to spread out or bring into position, lit. or fig., for use, action, etc.
Origin of deployFrench déployer, to unfold, display from Old French desployer, to unfold from Classical Latin displicare, to scatter (in ML, to unfold): see display