1. (a.) Of or pertaining to religion; concerned with religion; teaching, or setting forth, religion; set apart to religion; as, a religious society; a religious sect; a religious place; religious subjects, books, teachers, houses, wars.

2. (a.) Possessing, or conforming to, religion; pious; godly; as, a religious man, life, behavior, etc.

3. (a.) Scrupulously faithful or exact; strict.

4. (a.) Belonging to a religious order; bound by vows.

5. (n.) A person bound by monastic vows, or sequestered from secular concern, and devoted to a life of piety and religion; a monk or friar; a nun.