periphery

Universal Words noun [usuallysing.] (plural peripheries) (formal) 1 the outer edge of a particular area: industrial development on the periphery of the town * The condition makes it difficult for patients to see objects at the periphery of their vision. * Extensive new planting is taking place around the periphery of the site. 2 the less important part of sth, for example of a particular activity or of a social or political group: minor parties on the periphery of American politics