1. To straighten something that has been rolled, twisted or curled.
    Unroll your sleeping bag and spread it on the floor of the tent.
  2. To emerge, be revealed or become apparent; to unfold.
    We will have to see how the events unroll.
  3. 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.

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