locked in + place
Being unable to leave a place
Locked in means trapped inside or secured inside.
The staff were locked in the building overnight.
Locked in, into, down, out or up
Locked combines with different particles to express physical security, restriction, exclusion, or commitment. The meaning changes with each combination.
Quick answer
Which form is correct with locked?
Locked in, locked out, locked up, and locked down are standard combinations with distinct meanings. Locked into is also idiomatic and usually means committed to or trapped in a situation. Use the combination that matches the meaning you want.
We were locked out after midnight.
The country was locked down during the emergency.
She felt locked into a long-term contract.
The country was locked down during the emergency.
She felt locked into a long-term contract.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
locked out + place
Being unable to enter
Locked out describes exclusion from a building, room, or account.
I got locked out of my email account.
locked up + person or object
Being secured or imprisoned
Locked up often refers to something secured safely or a person imprisoned.
All the documents are locked up in a cabinet.
locked down + area or system
Restricting movement or access
Locked down means strictly controlled for security or safety reasons.
The airport was locked down after the incident.
locked into + arrangement
Being committed or trapped in a situation
Locked into is used for contracts, habits, systems, or unavoidable situations.
They are locked into a five-year agreement.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
locked in
The children were locked in the classroom.
Unable to get out or securely kept inside.
locked into
She feels locked into her current job.
Committed or trapped in a situation or arrangement.
locked down
The building was locked down for security checks.
Placed under strict control or restricted access.
locked out
He was locked out of the apartment.
Unable to enter.
locked up
The bicycles were locked up overnight.
Secured safely or kept in prison.
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using locked into for physical enclosure
Locked into usually refers to commitment or restriction, not being physically trapped in a room.
✕ We were locked into the house. ✓ We were locked in the house.Confusing locked out with locked in
Locked out means unable to enter, while locked in means unable to leave.
✕ She was locked in of her account. ✓ She was locked out of her account.Using locked down for ordinary locking
Locked down suggests strict security control, not simply closing a door.
✕ I locked down the front door. ✓ I locked the front door.Quick practice
Choose the expression that matches the intended meaning.
1. After losing his keys, he was ___ of the office.
2. The company is ___ a long-term software contract.
3. During the emergency, the campus was ___.
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Frequently asked questions
Is locked into always negative?
No. It can simply mean committed to a plan or contract, although it often suggests limited flexibility.
What is the difference between locked up and locked in?
Locked up usually focuses on security or imprisonment, while locked in focuses on being unable to leave.
Can locked out be used for online accounts?
Yes. It is common for computers, apps, and digital accounts.
Related preposition guides
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