Having or exhibiting due respect and affection for parents or others to whom respect and affection are due; also, pertaining to or consisting in the duties of respect and affection toward parents or others.Having faith in and reverence for the Supreme Being; actuated by faith in and reverence for God; godly; devout: said of persons.Dictated by reverence for God; proceeding from piety: said of things: as, pious awe; pious services; pious sorrow.Practised under the pretense of religion or for a good end: as, pious frauds.Religious, holy, righteous, saintly. See religion.