accustomed to sit much or long; as, a sedentary man.-characterized by, or requiring, much sitting; as, a sedentary employment; a sedentary life.-inactive; motionless; sluggish; hence, calm; tranquil.-caused by long sitting.-remaining in one place, especially when firmly attached to some object; as, the oyster is a sedentary mollusk; the barnacles are sedentary crustaceans.