1. a jail or prison, especially a temporary one
Usage: informal
2. the act of locking something up or securing it
3. a garage or storage space that can be locked
Usage: British

Examples

• The suspect was taken to the local lockup overnight.
• After the riot, several protesters were held in lockup.
• The lockup of the building occurs at 6 PM every evening.
• He rented a lockup to store his motorcycle during winter.
• The police station has a small lockup for temporary detention.
• She keeps her tools in the lockup behind her house.