noun

• (mathematics) Any mathematical rule expressed symbolically.
• (chemistry) A symbolic expression of the structure of a compound.
• A plan or method for dealing with a problem or for achieving a result.
• A formulation; a prescription; a mixture or solution made in a prescribed manner; the identity and quantities of ingredients of such a mixture.
• (especially religion) A formal statement of doctrine.
• (logic) 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) Ellipsis of infant formula; drink given to babies to substitute for mother's milk. [A manufactured food simulating human breast milk, designed to be fed to babies and infants under 12 months of age.]