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.
- Not moving or flowing; motionless.
- Foul or stale from standing: stagnant ponds.
- Showing little or no sign of activity or advancement; not developing or progressing; inactive: a stagnant economy.
- Lacking vitality or briskness; sluggish or dull: a stagnant mind.