What is the meaning of precipitation?

noun

• The quantity of water falling to earth at a specific place within a specified period of time.
  • usage: "the storm brought several inches of precipitation"
• The process of forming a chemical precipitate.
• The falling to earth of any form of water (rain or snow or hail or sleet or mist.
  • synonyms: downfall
• The act of casting down or falling headlong from a height.
• An unexpected acceleration or hastening.
  • usage: "he is responsible for the precipitation of his own demise"
• Overly eager speed (and possible carelessness. )
  • usage: "he soon regretted his haste"
  • synonyms: haste, hastiness, hurry, hurriedness