formula

1. Any mathematical rule expressed symbolically. (countable, uncountable) · x=(-b±√(b²-4ac))/(2a) is a formula for finding the roots of the quadratic equation ax² + bx + c = 0.
2. A symbolic expression of the structure of a compound. (countable, uncountable) · H₂O is the formula for water.
3. A plan or method for dealing with a problem or for achieving a result. (countable, uncountable) · The company's winning formula includes excellent service and quality products.
4. A formulation; a prescription; a mixture or solution made in a prescribed manner; the identity and quantities of ingredients of such a mixture. (countable, uncountable) · The formula of the rocket fuel has not been revealed.
5. A fixed phrase or set of words intended to be interpreted non-literally, typically used attitudinally or as part of convention; a formulation. (countable, uncountable) · Avoid the typical epistolic formalae, such as "Kind regards".
6. A formal statement of doctrine. (countable, uncountable)
7. A syntactic expression of a proposition, built up from quantifiers, logical connectives, variables, relation and operation symbols, and, depending on the type of logic, possibly other operators such as modal, temporal, deontic or epistemic ones. (countable, uncountable)

Plural formulas