lock-box

lockbox

[lok-boks]
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:
1870–75, Americanism; lock1 + box1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
lockbox

noun
a fireproof metal strongbox (usually in a bank) for storing valuables [syn: safe-deposit
WordNet® 3.0, © 2006 by Princeton University.
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