Definition of formula noun from the Oxford Advanced American Dictionary

        

    formula

     noun
    noun
    NAmE//ˈfɔrmyələ//
     
    (pl. formulas, formulae
    NAmE//ˈfɔrmyəli//
     
    )
     
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  1. 1[countable] (mathematics) a series of letters, numbers, or symbols that represent a rule or law This formula is used to calculate the area of a circle.
  2. 2[countable] (chemistry) letters and symbols that show the parts of a chemical compound, etc. CO is the formula for carbon monoxide.
  3. 3[countable] a particular method of doing or achieving something They're trying to work out a peace formula acceptable to both sides in the dispute. All the patients were interviewed according to a standard formula. formula for something/for doing something There's no magic formula for a perfect marriage.
  4. 4[countable] a list of the things that something is made from, giving the amount of each substance to use the secret formula for the blending of the whiskey
  5. 5 (also formula milk) [uncountable, countable] a type of liquid food for babies, given instead of breast milk
  6. 6[countable] a class of racing car, based on engine size, etc. Formula One racing™
  7. 7[countable] a fixed form of words used in a particular situation legal formulae The minister keeps coming out with the same tired formulas.
See the Oxford Advanced Learner's Dictionary entry: formula