Precipitation is rain, snow, sleet, or hail — any kind of weather condition where something's falling from the sky.

Precipitation has to do with things falling down, and not just from the sky. It's also what happens in chemical reactions when a solid settles to the bottom of a solution. If you have hard water where you live, you might find lime deposits — a flaky white crust — on your faucets and showerhead. That's caused by precipitation of the minerals in the water. The minerals settle out — they precipitate — and clog the pipes.

Primary Meanings of precipitation

the falling to earth of any form of water (rain or snow or hail or sleet or mist)
the process of forming a chemical precipitate
Full Definitions of precipitation

n the falling to earth of any form of water (rain or snow or hail or sleet or mist)

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fine spray
precipitation in very small drops
precipitation of ice pellets when there are strong rising air currents
rain, rainfall
water falling in drops from vapor condensed in the atmosphere
partially melted snow (or a mixture of rain and snow)
snow, snowfall
precipitation falling from clouds in the form of ice crystals
light wispy precipitation that evaporates before it reaches the ground (especially when the lower air is low in humidity)
any wind that changes direction with the seasons
a storm with rain
cloudburst, deluge, downpour, pelter, soaker, torrent, waterspout
a heavy rain
drizzle, mizzle
very light rain; stronger than mist but less than a shower
rain shower, shower
a brief period of precipitation
flurry, snow flurry
a light brief snowfall and gust of wind (or something resembling that)
an arctic atmospheric condition with clouds over snow produce a uniform whiteness and objects are difficult to see; occurs when the light reflected off the snow equals the light coming through the clouds
Type of:
atmospheric condition, conditions, weather, weather condition
the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation

n the quantity of water falling to earth at a specific place within a specified period of time

“the storm brought several inches of precipitation
Type of:
indefinite quantity
an estimated quantity

n the act of casting down or falling headlong from a height

Type of:
drop, fall
a free and rapid descent by the force of gravity

n an unexpected acceleration or hastening

“he is responsible for the precipitation of his own demise”
Type of:
an increase in rate of change

n overly eager speed (and possible carelessness)

haste, hastiness, hurriedness, hurry
abruptness, precipitance, precipitancy, precipitateness, precipitousness, suddenness
the quality of happening with headlong haste or without warning
Type of:
fastness, speed, swiftness
a rate (usually rapid) at which something happens

n the process of forming a chemical precipitate

Type of:
chemical action, chemical change, chemical process
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

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