Definition of: precipitation

(pri·sip′ə·tā′shən) noun
1. The act of casting down; the state of being thrown downward.
2. Headlong or rash haste or hurry; precipitancy; hastening; acceleration.
3. A falling, flowing, or rushing down with violence or rapidity.
4. Chem. The process of rendering insoluble and so separating any of the constituents of a solution, as by reagents; also, the precipitate.
5. Meteorol. The deposition of moisture from the atmosphere upon the general surface of the earth.
6. Materialization, as of spirits. [<F précipitation]