Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then precipitated—that is, become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides suitable conditions for many types of ecosystems, as well as water for hydroelectric power plants and crop irrigation.

"Rain" is the second song released by Australian Idol series two runner-up Anthony Callea, and features on his self-titled debut album Anthony Callea (2005). It was released as a double A-side set features the song plus his recording of Simon & Garfunkel's song "Bridge over Troubled Water", which he performed on Australian Idol.

Rain is a type of precipitation.