time lock

The definition of a time lock is a lock with a specific time set on it for opening.

(noun)

An example of a time lock is a lock on a bank vault that won't allow access until 8am.

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See time lock in Webster's New World College Dictionary

a lock with a mechanism that prevents opening before the set time

See time lock in American Heritage Dictionary 4

noun
A lock, as for a bank vault, containing a mechanism that prevents its being opened before a fixed time.
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