1. To roll (something) down; to unroll.
  2. To be inherited by someone else; to pass down the next person in a succession, especially through failure or loss of an earlier holder.
  3. To delegate (a responsibility, duty etc.) or someone.
  4. To fall as a duty or responsibility or someone.
  5. To degenerate; to break down.
    A discussion about politics may devolve into a shouting match.

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