# Corollary definition

kôrə-lĕrē, kŏr-
Frequency:
A natural consequence or effect; a result.
noun
A proposition that follows with little or no proof required from one already proven.
noun
Anything that follows as a normal result.
noun
A corollary is defined as an idea formed from something that is already proved.

If a+b=c, then an example of a corollary is that c-b=a.

Consequent; resultant.
The definition of a corollary is a natural consequence, or a result that naturally follows.

Obesity is an example of a corollary of regularly over-eating.

noun
A deduction or an inference.
noun
An inference or deduction.
noun
Something which occurs a fortiori, as a result of another effort without significant additional effort.

Finally getting that cracked window fixed was a nice corollary of redoing the whole storefont.

noun
Something given beyond what is actually due; something added or superfluous.
noun
A statement that follows with little or no proof required from an already proven statement. For example, it is a theorem in geometry that the angles opposite two congruent sides of a triangle are also congruent. A corollary to that statement is that an equilateral triangle is also equiangular.
A proposition that follows from another that has been proved.
noun
(mathematics, logic) A proposition which follows easily from the proof of another proposition.

We have proven that this set is finite and well ordered; as a corollary, we now know that there is an order-preserving map from it to the natural numbers.

noun

Singular:
corollary
Plural:
corollaries

## Origin of corollary

• Middle English corolarie from Latin corōllārium money paid for a garland, gratuity from corōlla small garland corolla

### From American Heritage Dictionary of the English Language, 5th Edition

• From Middle English, from Late Latin corōllārium (“deduction, consequence, originally money paid for a garland, hence gift, gratuity, something extra”), from corōlla (“small garland”), diminutive of corōna (“crown”).