The falling to earth of any form of water (rain or snow or hail or sleet or mist) WordNet 3.0 & Open English WordNet

In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls from clouds due to gravitational pull. Wikipedia

Any meteorological phenomenon featuring water falling from the clouds, such as rain, snow, or hail. Wikipedia Disambiguation

Product of the condensation of atmospheric water vapour that falls under gravity Wikidata

The settling out of water from cloud in the form of rain, hail, snow, etc. OmegaWiki

Any or all of the forms of water particles, whether liquid or solid, that fall from the atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground. Wiktionary