precipitation

noun

1. rain, snow, sleet, or hail that falls to the ground from the sky.

   B1

   uncountable

   • "There was heavy precipitation last night."A2
   • "The forecast predicts precipitation across the region."B1
   • "Annual precipitation in the desert is less than 250 mm."B2

2. the act of happening or being done suddenly and quickly, without careful thought.

   C1

   uncountableformal

   • "He regretted the precipitation of the decision."C1
   • "The precipitation of events caught everyone off guard."C2
   • "She blamed the crisis on the precipitation of the reforms."C2

3. in chemistry, the process of a solid forming in a liquid solution.

   C2

   uncountabletechnical

   • "The precipitation of salt occurs when the water evaporates."C1
   • "We measured the rate of precipitation in the reaction."C2
   • "Adding the reagent caused immediate precipitation of the compound."C2