Pronunciation: (pu-rif'u-rē),[key] —n., —pl.-er•ies. 1. the external boundary of any surface or area.
2. the external surface of a body.
3. the edge or outskirts, as of a city or urban area.
4. the relatively minor, irrelevant, or superficial aspects of the subject in question: The preliminary research did not, of course, take me beyond the periphery of my problem. 5. Anat.the area in which nerves end.