Definitions of unfasten:
  • verb:   become undone or untied
    Example: "The shoelaces unfastened"
  • verb:   cause to become undone
    Example: "Unfasten your belt"

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Search for unfasten at other dictionaries: OneLook, Oxford, American Heritage, Merriam-Webster, Wikipedia

Book See unfasten used in context: 1 rhyme, 1 Shakespeare work, several books and articles.

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