adjective, de·vout·er, de·vout·est.
- devoted to divine worship or service; pious; religious: a devout Catholic.
- expressing devotion or piety: devout prayer.
- earnest or sincere; hearty: He had a devout allegiance to the political regime.
- deeply religious; reverent
- sincere; earnest; heartfelta devout confession
adj.early 13c., from Old French devot “pious, devoted, assiduous,” from Latin devotus “given up by vow, devoted,” past participle of devovere “dedicate by vow” (see devotion).