precipitation - definition and synonyms

noun [uncountable] 

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/prɪˌsɪpɪˈteɪʃ(ə)n/
  1. 1
    science rain, snow, hail etc
  2. 2
    chemistry the process by which a solid substance separates, or is separated from, a liquid it is in
  3. 3
    formal a way of behaving in which someone does something too quickly and without enough thought