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

One corollary number that Resendez points to is that median household income is around $80,000.

From MarketWatch • Mar. 4, 2026

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

From Barron's • Feb. 20, 2026

The old maxim “Buy low, sell high” has a cash-flow corollary: “Collect early, pay late.”

From The Wall Street Journal • Jan. 14, 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

In Washington’s case, the most obvious corollary to his view of American national interest was the avoidance of a major war during the gestative phase of national development.

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis

Related Words

• analogy
• upshot