n. [ Cf. F. impeccabilité. ] The quality of being impeccable; exemption from sin, error, or offense. [ 1913 Webster ]

Infallibility and impeccability are two of his attributes. Pope. [ 1913 Webster ]

a. [ L. impeccabilis; pref. im- not + peccare to err, to sin: cf. F. impeccable. ] Not liable to sin; exempt from the possibility of doing wrong. -- n. One who is impeccable; esp., one of a sect of Gnostic heretics who asserted their sinlessness. [ 1913 Webster ]

God is infallible, impeccable, and absolutely perfect. P. Skelton. [ 1913 Webster ]