lockup

noun

lock·​up ˈläk-ˌəp 

1

: jail

especially : a local jail where persons are detained prior to court hearing

2

: an act of locking : the state of being locked

Synonyms of lockup

• jail
• prison
• penitentiary

Examples of lockup in a Sentence

the firm conviction that juvenile offenders should never be held in adult lockups

Recent Examples on the Web

Take the brake-by-wire system, which blends the disc brakes’ stopping power with the 849’s regenerative braking to reduce jerk, prevent lockup, and maximize performance. —Erik Shilling, Robb Report, 21 Mar. 2026

The request comes amid growing concern over conditions inside county lockups. —Los Angeles Times, 19 Mar. 2026

After he was arrested and placed into lockup at the police department, Cabassa reportedly flooded a portion of the building after blocking his toilet in his cell. —Staff Report, Hartford Courant, 14 Mar. 2026

Another factor likely contributing to StubHub’s falling share price is the expiration of its 180-day lockup. —Luisa Beltran, Sportico.com, 5 Mar. 2026

Word History

First Known Use

1746, in the meaning defined at sense 1

Rhymes for lockup

• backup
• blowup
• breakup
• buildup
• checkup
• cleanup
• holdup
• hookup
• lineup
• makeup
• markup
• pickup

Kids Definition

lockup

noun

lock·​up -ˌəp 

: prison sense 2, jail

Legal Definition

lockup

noun

lock·​up

1

: a cell or group of cells (as in a courthouse) or jail where persons are held prior to a court hearing compare house of correction, house of detention, jail, penitentiary, prison

2

: the tactic of arranging with a friendly party an option to buy a valuable portion of one's corporate assets in order to discourage a takeover by another party