pe·riph·ery 
/pəˈrɪfəri/ noun
plural pe·riph·er·ies /pəˈrɪfəri/ noun [count] formal : the outside edge of an area : the area that surrounds a place or thing — often + of ▪ A fence was built around the periphery of the site. ▪ The factory is located on the periphery of the city. — often used figuratively ▪ the periphery of society ▪ There was little we could do as we watched the case unfold from the periphery. [=we were not actively involved so there was little we could do]
