Source : Webster's Revised Unabridged Dictionary (1913)

Piety \Pi"e*ty\, n. [F. pi['e]t['e]; cf. It. piet[`a]; both fr.
   L. pietas piety, fr. pius pious. See {Pious}, and cf.
   {Pity}.]
   1. Veneration or reverence of the Supreme Being, and love of
      his character; loving obedience to the will of God, and
      earnest devotion to his service.

            Piety is the only proper and adequate relief of
            decaying man.                         --Rambler.

   2. Duty; dutifulness; filial reverence and devotion;
      affectionate reverence and service shown toward parents,
      relatives, benefactors, country, etc.

            Conferred upon me for the piety Which to my country
            I was judged to have shown.           --Milton.

   Syn: Religion; sanctity; devotion; godliness; holiness. See
        {Religion}.

Source : WordNet®

piety
     n : righteousness by virtue of being pious [syn: {piousness}]
         [ant: {impiety}]