noun /pəˈrɪfəri/
  1. the outer edge of a particular area
    • [on the periphery of something] 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 something, for example of a particular activity or of a social or political group
    • [on the periphery of something] minor parties on the periphery of American politics
Origin: late 16th cent. (denoting a line that forms the boundary of something): via late Latin from Greek periphereia ‘circumference’, from peripherēs ‘revolving around’, from peri- ‘around’ + pherein ‘to bear’.

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