What is the definition or description of: autonomic?

Wikipedia: ANS: The autonomic nervous system (ans or visceral nervous system or involuntary nervous system) is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness, and controls visceral functions, such as heart rate, digestion, respiratory rate, salivation, perspiration, pupillary dilation, urination, and sexual arousal.

Nervous system: Nervous system divided into somatic and autonomic systems. Somatic are nerves going to arms legs trunk skin muscle. Autonomic system nervous system providing enervation to visceral organs.