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to lock up
[phrase form: lock]
01
to close or secure something in a place where it cannot be removed or accessed without the appropriate authorization, key, or combination
02
to confine a person in a place, such as a prison, where they cannot escape without one's permission
Example
The individual locked up their personal belongings in a storage locker.
The scientist locked up the dangerous chemicals in a secure laboratory.
The store owner locked up the valuables in the safe.
The police locked up the suspect in the detention center.
The authorities locked up the dissidents in a maximum-security prison.
