post exchange
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Post Exchange
Abbr. PX
A service mark used for a store on a military base that sells goods to military personnel and their families or to authorized civilians.
post exchange
n
(Military) US a government-subsidized shop operated mainly for military personnel. Abbreviation: PX
post′ exchange`
n.
a retail store on a military post.
[1890–95]
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| Noun | 1. |  post exchange - a commissary on a United States Army postcommissary - a retail store that sells equipment and provisions (usually to military personnel) |