Formula is a noun with multiple meanings:
1. In mathematics and science, a formula is a concise way of expressing information symbolically, as in a mathematical or chemical formula.
2. A method, pattern, or rule for doing or producing something, often one that has been tested and proved to be successful.
3. A list of ingredients with which something is made, especially in baby formula or pharmaceutical formulas.
4. In motor racing, a set of specifications to which all racing cars must conform (e.g., Formula One).