Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “autonomic nervous system”

autonomic nervous system

noun [C] /ˈɔ·t̬əˈnɑm·ɪk ˈnɜr·vəs ˌsɪs·təm/
biology the part of the nervous system that controls automatic processes such as breathing, digestion, and the beating of the heart
(Definition of autonomic nervous system from the Cambridge Academic Content Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Word of the Day


When animals or people stampede, they all move quickly in the same direction, often because they are frightened.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More