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to lock up

to lock up

300 4.0
Put someone or something in a place where they cannot leave, for example a jail
  • phrasal verb
  • /lɑk ʌp/
translation icon : encerrar
  • The suspect was locked up in a secure cell to prevent any escape attempts.
  • lock people up
  • locked up in prison
  • locked up girls

Who did George Bush lock up for what he said?

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Examples

  • An incredible 80.7 percent of locked-up girls report having run away from home.

    Academic text (2004)
  • People are indeed locked up for expressing opposition and are sometimes handled roughly.

    Academic text (1996)
  • This is the time you are all locked up in your homes, in your rooms.

  • However, after paying the money, he was locked up and placed in jail for six months.

    Academic text (1992)
  • "I'm sorry my husband had to lock you up, but he thought you might be dangerous."

    Fiction book (1995)
  • We locked him up and threw away the key.

  • And then the second thing that's so important, lock up your guns.

  • I went back into the house, locked up, and climbed the stairs to bed.

    Fiction book (1992)
  • Maybe then they'd lock him up and you could get on with a more normal life.

    Fiction book (1995)
  • All chemicals should be labeled and locked up except when being used under supervision.

    Academic text (2002)

Synonyms

to lock
vsto lock up
1.0

To fasten something with a key so other people cannot open it

focuses more on the act of putting into a safe or secure place
to trap
vsto lock up
919 2.6

To catch and hold someone or something so they cannot leave

is about intentional placing for safety or prevention, not just capture methods
to imprison
vsto lock up
  • Formal
178 4.2

Put someone in prison as a punishment or keep them locked up

is broader, including nonpunitive confinement for safety or prevention
to detain
vsto lock up
  • Formal
169 5.9

To keep someone with the police for questioning

is more general, applying also to safety or simple prevention of escape
to put away
vsto lock up
115 5.8

To lock someone in prison or a secure place

can mean that too but also includes nonpunitive safety placements
to jail
vsto lock up
108 2.1

To put someone in prison as punishment

covers that case but also everyday secure or safety placements
to lock in
vsto lock up
70 3.9

To keep something inside so it cannot escape by closing or locking

is similar but emphasizes placing for safety or prevention rather than sealing
to shut up
vsto lock up
50 5.5

Lock someone inside a place so they cannot leave

focuses on safety or preventing escape rather than absolute sealing
to shackle
vsto lock up
35 6.2

To restrain someone with chains or limit their freedom

focuses on placing somewhere secure rather than using physical bindings
to lock away
vsto lock up
32 3.4

Put someone or something somewhere they cannot leave and others cannot reach

is the same idea but highlights safety as a common reason
to padlock
vsto lock up
11 3.4

To fasten something using a small metal lock with a U-shaped bar

refers generally to placing in a secure place, not only the fastening method
to shut away
vsto lock up
3 5.5

Keep people and things in a place where they cannot leave or be seen

keeps the same confinement idea but stresses safety or escape prevention
to cage in
vsto lock up
2 5.4

To put someone or something into a small space with bars to stop them moving freely

is broader, including many secure places not necessarily cages
to immure
vsto lock up
  • Archaic
1 9.9

To lock someone inside a room or building against their will

is similar but commonly used for keeping safe as well as imprisoning
to coop up
vsto lock up
  • Informal
1 6.4

To keep a person or animal inside a small space like a cage

covers confinement generally but does not imply small or cramped conditions
to shut in
vsto lock up
5.1

Surround something completely so it cannot get out or move

shares enclosure but is used more for general safety or restraint reasons

Antonyms

1.8

To let someone or something go free from being held

218 2.7

To let a person or animal go after keeping them in a place where they could not leave

How Confined

to imprison
  • Formal
178 4.2
to lock up
300 4.0
to detain
  • Formal
169 5.9

Surface Forms

lock up infinitive
locked up past
locked up past participle
locking up present participle
locks up third person singular

Morphology

lock + up

The meaning is directly built from 'lock' (to fasten or secure) plus the particle 'up', which here signals completion/intensification and confinement; a B1 learner who knows both words would readily infer that it means to secure or confine so someone/something cannot leave. This is a regular, compositional phrasal-verb pattern in English and is therefore transparent.

Etymology

Lock up comes from the clear picture of closing a gate or door and locking a person or animal inside so they cannot get out, with up showing they are fully held in. That's why it means 'to put someone in a place' they cannot leave, often to keep them safe or to stop them leaving.