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[dih-ploi] /dɪˈplɔɪ/
verb (used with object)
Military. to spread out (troops) so as to form an extended front or line.
to arrange in a position of readiness, or to move strategically or appropriately:
to deploy a battery of new missiles.
verb (used without object)
to spread out strategically or in an extended front or line.
to come into a position ready for use:
the plane can't land unless the landing gear deploys.
Origin of deploy
1470-80; < French déployer, equivalent to dé- dis-1 + ployer to fold; see ploy
Related forms
deployable, adjective
deployability, noun
deployment, noun
counterdeployment, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for deployment
Contemporary Examples
Historical Examples
  • The deployment of the approaching Earth fleet was almost as he had expected it would be.

    The Highest Treason Randall Garrett
  • Action of brigade and regimental commanders in deployment of division.

  • The order for deployment must be given whilst the troops are in rapid motion.

    Cavalry in Future Wars Frederick von Bernhardi.
  • If deployment was the answer to that, it was certainly there—to a degree, at least.

    The Planet Strappers Raymond Zinke Gallun
  • deployment was supposed to be the significant factor, there.

    The Planet Strappers Raymond Zinke Gallun
British Dictionary definitions for deployment


verb (mainly military)
to adopt or cause to adopt a battle formation, esp from a narrow front formation
(transitive) to redistribute (forces) to or within a given area
Derived Forms
deployment, noun
Word Origin
C18: from French déployer, from Latin displicāre to unfold; see display
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for deployment

1796, from French déploiement, from déployer (see deploy).



1786 as a military word, from French déployer "unroll, unfold," from Old French desploiier "unfold," from Latin displicare "unfold, scatter," from dis- (see dis-) + plicare "to fold" see ply (v.1)). "In its AFr. form regularly adopted in ME as desplay" [OED]. Related: Deployed; deploying.

Online Etymology Dictionary, © 2010 Douglas Harper
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