corollary

American  

[kawr-uh-ler-ee, kor-, kuh-rol-uh-ree] / ˈkɔr əˌlɛr i, ˈkɒr-, kəˈrɒl ə ri /

noun

plural

corollaries

1. Mathematics. a proposition that is incidentally proved in proving another proposition.

2. an immediate consequence or easily drawn conclusion.

3. a natural consequence or result.

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corollary British  

/ kəˈrɒlərɪ /

noun

1. a proposition that follows directly from the proof of another proposition

2. an obvious deduction

3. a natural consequence or result

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adjective

1. consequent or resultant

corollary Scientific  

/ kôr′ə-lĕr′ē /

1. 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.

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Etymology

Origin of corollary

1325–75; Middle English < Late Latin corollārium corollary, in Latin: money paid for a garland, a gift, gratuity. See corolla, -ary

Example Sentences

The corollary is lower sales, thinner margins and smaller corporate profits.

From Barron's • Feb. 20, 2026

A corollary of Erb’s investment lesson is that when an asset that previously deviated from fair value eventually returns towards fair value, there is no guarantee that it will stop once it gets there.

From MarketWatch • Feb. 10, 2026

Just to put my Captain Obvious pants on for a minute, the corollary to everything you just said is that he’s also decided he’s going to tell us what the truth is, right?

From Slate • Oct. 17, 2025

The corollary to superpower arms-control efforts was preventing proliferation.

From The Wall Street Journal • Oct. 12, 2025

The corollary is that widespread and open trade in ideas is the best way to make up for the lacunae.

From "1491" by Charles C. Mann

Related Words

• analogy
• upshot