Source : Webster's Revised Unabridged Dictionary (1913)

Piously \Pi"ous*ly\, adv.
   In a pious manner.

Source : WordNet®

piously
     adv 1: in a pious manner; "this received opinion is piously
            affirmed" [ant: {impiously}]
     2: in a devout and pious manner; "she was devoutly Catholic"
        [syn: {devoutly}]