To cause to happen, especially suddenly or prematurely: an announcement that precipitated a political crisis. To cause to fall down from a height; hurl downward:"The finest bridge in all Peru broke and precipitated five travelers into the gulf below"(Thornton Wilder). To put suddenly into a certain state or condition:"He was like a man who had never known liberty and was all at once precipitated into it"(Taylor Caldwell). Meteorology To cause (a form of water, as rain or snow) to fall from the air. Chemistry To cause (a solid substance) to be separated from a solution. Meteorology To fall from the air as a form of water, such as rain or snow. Chemistry To be separated from a solution as a solid. Moving rapidly and heedlessly; speeding headlong. Acting with or marked by excessive haste and lack of due deliberation. See Synonyms at impetuous. Occurring suddenly or unexpectedly. Chemistry A solid or solid phase separated from a solution. A product resulting from a process, event, or course of action.