lock in

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lock in ‎(plural lock ins)

  1. A sleepover party, usually held in a public place such as a church or school, in which the participants are not allowed to leave until the next morning.
    The youth group will have their annual lock-in this weekend.



lock in ‎(third-person singular simple present locks in, present participle locking in, simple past and past participle locked in)

  1. To secure someone or something in a locked enclosure.
  2. To fix the value of something potentially variable.
    I've locked in a rate of 5%


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