2. reverent. Religious,devout,pious indicate a spirit of reverence toward God. Religious is a general word, applying to whatever pertains to faith or worship: a religious ceremony.Devout indicates a fervent spirit, usually genuine and often independent of outward observances: a deeply devout though unorthodox church member.Pious implies constant attention to, and extreme conformity with, outward observances. It can also suggest sham or hypocrisy: a pious hypocrite.3. devoted, unswerving, meticulous.
c.1200, "devout, pious, imbued with or expressive of religious devotion," from Anglo-French religius, Old French religious (12c., Modern French religieux) and directly from Latin religiosus, from religio (see religion). Meaning "pertaining to religion" is from 1530s. Transferred sense of "scrupulous, exact" is recorded from 1590s. Related: Religiousness.