unknot UK /ˈʌn.nɒt/US /ˈʌn.nɑt/noun 1/ʌnˈnɑt/ verb 1forms 3 noun1 •In knot theory, a loop that is not knotted. unknot UK /ʌnˈnɒt/US /ʌnˈnɑt/ verb1 •To unfasten (a knot). formsunknotted · unknotting · unknots