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to lock up

to lock up

97 2.6
Close a house or safe with a key to keep people out
  • phrasal verb
  • /lɑk ʌp/
translation icon : cerrar con llave
  • I'd hidden my truck a couple of miles away and locked up the cabin so they'd think I was gone.
  • lock up the house
  • lock up the doors
  • forget to lock up

The NRA, they very much advocate for locking up the guns.

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Examples

  • Ah, screw it; I'll just lock the store up and leave him a note.

    Fiction book (1994)
  • We lock up the house...

  • "I was on my way to lock up the lab."

    Fiction book (1990)
  • Lock up if you leave.

  • Mrs. Pack went to get her shoes and to lock up the trailer.

    Fiction book (1998)
  • What I'm calling to tell you is to lock up your house.

    Fiction book (1998)
  • Silberman Lewis, see these gentlemen out and have them lock up for the night.

    Fiction book (1991)
  • Before leaving for vacation, make sure to lock up the house to keep it safe from intruders.

  • It's important to lock up all your valuables in a safe place when you leave the room.

  • Always lock up your bicycle when you park it to prevent theft.

Synonyms

to lock
vsto lock up
1.0

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

is less about the mechanism and more about fastening to prevent access
to secure
vsto lock up
347 3.3

To fasten firmly so it cannot move or be taken

focuses specifically on fastening to stop unauthorized entry rather than broad fixing
to bolt
vsto lock up
34 2.8

To fasten a door or gate with a sliding metal bar

is wider in use, meaning fastening to stop access beyond sliding bars
to padlock
vsto lock up
11 3.4

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

is the general act of fastening to prevent unauthorized entry rather than a device
to bolt the door
vsto lock up
3 2.7

To slide a metal bar across a door to keep it closed

is the general fastening action to prevent entry, not only sliding bars
to hasp
vsto lock up
9.6

To fasten a door or box with a hinged metal plate and lock it

is broader, referring to fastening to stop access rather than a specific clasp

Antonyms

212 1.0

To open a lock using a key or code

How Secure

to lock up
97 2.6
to padlock
11 3.4
to fasten
68 1.6
to close
1.0

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 simple image of closing a door and turning a lock so nothing can get inside, with up showing the action is complete. That's why it means 'to secure' a building or valuables by locking them.