What is the meaning of clouding?

noun

• The process whereby water particles become visible in the sky.
  • synonyms: clouding up

verb

• Make overcast or cloudy.
  • usage: "Fall weather often overcasts our beaches"
  • synonyms: overcast, cloud
• Make less visible or unclear.
  • usage: "The stars are obscured by the clouds"; "the big elm tree obscures our view of the valley"
  • synonyms: obscure, befog, becloud, obnubilate, haze over, fog, cloud, mist
• Billow up in the form of a cloud.
  • usage: "The smoke clouded above the houses"
  • synonyms: cloud
• Make gloomy or depressed.
  • usage: "Their faces were clouded with sadness"
  • synonyms: cloud
• Place under suspicion or cast doubt upon.
  • usage: "sully someone's reputation"
  • synonyms: defile, sully, corrupt, taint, cloud
• Make less clear.
  • usage: "the stroke clouded memories of her youth"
  • synonyms: cloud
• Colour with streaks or blotches of different shades.
  • synonyms: mottle, dapple, cloud
• Make milky or dull.
  • usage: "The chemical clouded the liquid to which it was added"
  • synonyms: cloud