1. That stagnates; not flowing; not running in a current or steam; motionless; hence, impure or foul from want of motion; as, a stagnant lake or pond; stagnant blood in the veins.
2. Not active or brisk; dull; as, business in stagnant. That gloomy slumber of the stagnant soul. (Johnson) For him a stagnant life was not worth living. (Palfrey)
Origin: L. Stagnans, -antis, p.pr. Of stagnare. See Stagnate.