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lockbox

[lok-boks] /ˈlɒkˌbɒks/
noun
1.
a strongbox.
2.
a rented post-office box equipped with a lock.
3.
Also called lockout box. Television. a closed box, usually fitted with a lock, containing electronic equipment to unscramble cable television pictures for subscribers only: used especially to prevent children from watching programs with explicit sexual content.
Origin
1870-1875
1870-75, Americanism; lock1 + box1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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