plural formulas also formulae
-ˌliː
1
a
: a plan or method for doing, making, or achieving something
His investment strategy is based on a simple formula.
This has proven to be a winning formula.
—often + fora formula for success/happiness
There is no magic formula [=no simple and certain method] for achieving success in the business world.
b
: a list of the ingredients used for making something (such as a medicine or a drink)
The product is made using a secret formula that the company refuses to reveal.
2
a
mathematics
: a general fact or rule expressed in letters and symbols
The formula for the area of a rectangle is l X w. [=length times width]
b
chemistry
: a series of letters, numbers, and symbols showing the chemicals that a compound is made of
The formula for water is H2O.
chemical formulas
3
US
: a liquid that usually contains milk and that is used for feeding a baby
infants drinking formula instead of their mother's milk
4
a
: a set of words that are commonly used in a way that does not seem original or sincere : a conventional statement
Politicians often resort to familiar formulas when discussing controversial issues.
b
: a common way of creating or telling a story in a movie, book, etc.
the narrative formula offered in so many movies
All her books are written according to a familiar formula.
Cite this Entry
“Formula.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/formula. Accessed 13 Jul. 2026.
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