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From un- +‎ roll.


  • (file)


unroll (third-person singular simple present unrolls, present participle unrolling, simple past and past participle unrolled)

  1. (transitive) To straighten something that has been rolled, twisted or curled.
    Unroll your sleeping bag and spread it on the floor of the tent.
  2. (intransitive) To emerge, be revealed or become apparent; to unfold.
    We will have to see how the events unroll.
  3. (transitive, programming, software compilation) To replace (a loop in a program) with a repetitive sequence of the individual instructions that the loop would carry out, sometimes used as an optimization.
    Synonym: unwind

Related terms[edit]