Definition of lock verb from the Oxford Advanced Learner's Dictionary

      

    lock

     verb
    verb
    BrE BrE//lɒk//
     
    ; NAmE NAmE//lɑːk//
     
    Verb Forms present simple I / you / we / they lock
    BrE BrE//lɒk//
     
    ; NAmE NAmE//lɑːk//
     
    he / she / it locks
    BrE BrE//lɒks//
     
    ; NAmE NAmE//lɑːks//
     
    past simple locked
    BrE BrE//lɒkt//
     
    ; NAmE NAmE//lɑːkt//
     
    past participle locked
    BrE BrE//lɒkt//
     
    ; NAmE NAmE//lɑːkt//
     
    -ing form locking
    BrE BrE//ˈlɒkɪŋ//
     
    ; NAmE NAmE//ˈlɑːkɪŋ//
     
    Driving
     
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  1. 1  [transitive, intransitive] lock (something) to fasten something with a lock; to be fastened with a lock Did you lock the door? The gates are locked at 6 o'clock. This suitcase doesn't lock.
  2. 2  [transitive] lock something + adv./prep. to put something in a safe place and lock it She locked her passport and money in the safe.
  3. 3[intransitive, transitive] lock (something) (in/into/around, etc. something) | lock (something) (together) to become or make something become fixed in one position and unable to move The brakes locked and the car skidded. He locked his helmet into position with a click. See related entries: Driving
  4. 4[transitive] be locked in/into something to be involved in a difficult situation, an argument, a disagreement, etc. The two sides are locked into a bitter dispute. She felt locked in a loveless marriage.
  5. 5[transitive] be locked together/in something to be held very tightly by somebody They were locked in a passionate embrace.
  6. 6 [transitive] lock something (computing) to prevent computer data from being changed or looked at by somebody without permission These files are locked to protect confidentiality.
  7. Word Originverb Old English loc, of Germanic origin; related to German Loch ‘hole’.Extra examples All the valuables were safely locked away. He carefully locked the door behind him. I locked myself in the bathroom. I was terrified they would lock me in again. Keep your garage securely locked. The door locks automatically. The gates are locked at 6 o’clock. This suitcase doesn’t lock.Idioms
    lock horns (with somebody) (over something)
     
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    to get involved in an argument or a disagreement with somebody The company has locked horns with the unions over proposed pay cuts.
    Phrasal Verbslock somebody awaylock something awaylock somebody inlock onto somethinglock somebody outlock somebody outlock uplock up somebodylock up something
See the Oxford Advanced American Dictionary entry: lock