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lock

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verb lock pronunciation in British English /lɒk/ 
Word Forms
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present tense
I/you/we/theylock
he/she/itlocks
present participlelocking
past tenselocked
past participlelocked
  1. 1
    [transitive] to fasten something such as a door or a container, usually with a key, so that other people cannot open it

    John went out and locked the door behind him.

    Have you locked the car?

    lock something in something:

    She locked the documents in the safe.

    Synonyms and related words for this sense of lock
    1. a.
      [intransitive] to become fastened with a lock

      The door slammed and locked.

      This drawer won't lock.

      Synonyms and related words for this sense of lock
  2. 2
    [intransitive] if something locks in a particular position, it is firmly fixed or held in that position

    The brakes locked and the car spun off the road.

    1. a.
      [transitive] to lock or fix something firmly in a particular position

      He locked his arms around her waist.

      Synonyms and related words for this sense of lock
  3. 3
    [transitive] computing to prevent information on a computer from being changed or looked at by someone who does not have permission

    All entries are locked so no unauthorized modifications can be made.

    Synonyms and related words for this sense of lock
  4. 4
    [intransitive/transitive] literary if two people's eyes lock, they look directly into each other's eyes
    Synonyms and related words for this sense of lock

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