lockup

/ˈlɑkˌʌp/
noun
  1. A place where people are kept as prisoners, especially a small local jail or a cell in a police station.
    • He spent a few hours in the lockup before being released on bail.
    • The small town's lockup only had two cells.
    • The suspect was held in the police station lockup overnight.
  2. A period of time during which people are required to stay inside a building for safety or security reasons.
    • The school had a lockup after a suspicious person was seen nearby.
    • The prison went into a lockup after the fight in the yard.
    • During the lockup, no one was allowed to leave the building.
  3. An investment or agreement that prevents people from selling or withdrawing money for a set period.
    • There is a lockup on the shares until next March.
    • The new savings account has a one-year lockup on the funds.
    • Investors agreed to a lockup period of six months after the company went public.
Antonyms