›to put something into use: [I]When airbags deploy, they save lives.[T]Automobiles deploy air bags in crashes of 8 to 12 miles per hour.›To deploy is also to move weapons or military forces to where they will be used when they are needed: [T]The UN is deploying observers.deployment
/dɪˈplɔɪ·mənt/n[U]›the deployment of missiles/troops