pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the sympathetic system, as in inhibiting heartbeat or contracting the pupil of the eye.
Then the parasympathetic nervous system steps in, and the body stabilizes to a calmer state.
First step is getting ahold of the parasympathetic nervous system linking breathing and meditation.
In the teeth of a full-blown sympathetic response, the parasympathetic system now swings into overdrive.
British Dictionary definitions for parasympathetic
(anatomy, physiol) of or relating to the division of the autonomic nervous system that acts in opposition to the sympathetic system by slowing the heartbeat, constricting the bronchi of the lungs, stimulating the smooth muscles of the digestive tract, etc Compare sympathetic (sense 4)