Definition of peripheral

adjective (a)

• on or near an edge or constituting an outer boundary; the outer area (adj.all)

  Antonym: central
  

  Example:
  Russia's peripheral provinces.
  Peripheral suburbs.
  

  source: wordnet30
• Of or pertaining to a periphery; constituting a periphery; peripheric. (adjective)

  source: webster1913

noun (n)

• (computer science) electronic equipment connected by cable to the CPU of a computer (noun.artifact)

  Synonym: computer peripheral, peripheral device
  

  Example:
  Disk drives and printers are important peripherals.
  

  source: wordnet30

adjective satellite (s)

• related to the key issue but not of central importance (adj.all)

  Example:
  A peripheral interest.
  Energy is far from a peripheral issue in the economy.
  Peripheral issues.
  

  source: wordnet30

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