Phrasal verbs "lock in" vs "lock up"

Differences between lock in and lock up

Lock in usually means to secure or confirm an agreement or plan, whereas lock up generally means to physically secure something or someone in a locked place.

Meanings and Definitions: lock in vs lock up

Learn how to use these expressions through these examples

Lock in

  • 1Lock a place to stop someone leaving.

    They LOCKED him IN the room until he had calmed down.

  • 2Commit someone in such a way that they cannot leave.

    They are LOCKED IN now that they have paid their subscription.

Lock up

  • 1Close all doors, windows, etc..

    She LOCKED UP after everyone had left and went home.

  • 2Lock something in a safe place.

    I LOCKED my money UP in the safe.

  • 3Put in prison or a mental hospital.

    They LOCKED him UP for burglary.

Usage Examples: lock in, lock up in Sentences

Learn how to use these expressions through these examples

lock in

Example

Please lock in the valuables before leaving the house.

Example

She locks in her bike every night to prevent theft.

lock up

Example

Please lock up the office before you leave.

Example

She always locks up the house before going to bed.

Similar Expressions(Synonyms) of Lock in

To make a final decision or agreement on something.

Example

We need to finalize the details of the project before we can start working on it.

To verify or ensure the accuracy or truth of something.

Example

Please confirm your attendance at the meeting by replying to this email.

To make something safe or protected from harm or danger.

Example

We need to secure the funding before we can start building the new facility.

Similar Expressions(Synonyms) of Lock up

To physically protect or safeguard something from theft or damage.

Example

Please secure your valuables in the locker before entering the gym.

To put someone in jail or prison as a punishment for a crime.

Example

The suspect was imprisoned for ten years for his involvement in the robbery.

To keep someone in custody or under arrest for questioning or investigation.

Example

The police detained the suspect for further investigation into the murder case.

Explore more Phrasal Verbs

Here are some phrasal verbs with the same verbs or particles

Phrasal Verbs with “in”

Phrasal Verbs with “up”

Differences in lock in vs lock up: Usage, Formality, and Tone

Frequency in Daily Use: lock in or lock up?

In daily conversation, people use lock up more often than lock in. This is because lock up is used for more physical actions such as locking doors or securing valuables. Lock in is not used as much. It's mainly used when we're talking about confirming plans or agreements. So, while both phrases are used, lock up is more common in everyday conversation.

Informal vs Formal: Contextual Use of lock in and lock up

Lock in and lock up are informal phrases often used in casual conversations. They are suitable for everyday interactions with friends and family. In more formal settings like business or academic contexts, using alternative expressions can convey a more polished tone.

Tone and Implication: The Nuances of lock in and lock up

The tone of lock in and lock up can differ based on context. Lock in often carries a positive or determined tone when related to confirming plans or agreements, while lock up typically has a cautious or negative tone, especially when referring to physically securing something or someone.

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