Rain
Rain or rainfall is a form of atmospheric precipitation composed of droplets of water aerosols that have condensed from atmospheric water vapor and fall by gravity. Depending on the intensity, rain can be described as a drizzle, a shower, a cloudburst or a downpour. It is also often accompanied by other weather phenomena such as strong wind (rainstorm) and lightning (thunderstorm), and may be mixed with hail/ice pellet, snow (sleet) and sandstorm. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on Earth. It provides water for hydroelectric power plants, crop irrigation, and suitable conditions for many types of ecosystems.
Read on Wikipedia