What is the meaning of pallid?

adjective

• Abnormally deficient in color as suggesting physical or emotional distress.
  • usage: "the pallid face of the invalid"; "her wan face suddenly flushed"
  • synonyms: pale, wan
• 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, wan, sick
• Lacking in vitality or interest or effectiveness.
  • usage: "a pale rendition of the aria"; "pale prose with the faint sweetness of lavender"; "a pallid performance"
  • synonyms: pale