What is the meaning of wan?

noun

• A computer network that spans a wider area than does a local area network.
  • synonyms: wide area network

verb

• Become pale and sickly.

adjective

• Of light. ( lacking in intensity or brightness; dim or feeble)
  • usage: "the pale light of a half moon"; "a pale sun"; "the late afternoon light coming through the el tracks fell in pale oblongs on the street"; "a pallid sky"; "the pale (or wan) stars"; "the wan light of dawn"
  • synonyms: pale, pallid, sick
• Abnormally deficient in color as suggesting physical or emotional distress.
  • usage: "the pallid face of the invalid"; "her wan face suddenly flushed"
  • synonyms: pale, pallid
• Lacking vitality as from weariness or illness or unhappiness.
  • usage: "a wan smile"