corollary

UK: /kəˈrɒləri/

US: /ˈkɔrəˌlɛri, ˈkɑr-/

US: (kôr′ə ler′ē, kor′-; esp. Brit., kə rol′ə rē)

Inflections of 'corollary' (n): npl: corollaries

WordReference Random House Learner's Dictionary of American English © 2026

cor•ol•lar•y /ˈkɔrəˌlɛri, ˈkɑr-/   n. [countable] , pl. -ies. 

1. an immediate consequence;
   a conclusion that follows naturally:
   An unfortunate corollary to his economic plan is high unemployment.

WordReference Random House Unabridged Dictionary of American English © 2026

cor•ol•lar•y  (kôr′ə ler′ē, kor′-; esp. Brit., kə rol′ə rē), n., pl. -lar•ies. 

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.

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

Collins Concise English Dictionary © HarperCollins Publishers::

corollary / kəˈrɒlərɪ/ noun ( -laries)

1. a proposition that follows directly from the proof of another proposition
2. an obvious deduction
3. a natural consequence or result

Etymology: 14th Century: from Latin corollārium money paid for a garland, from Latin corolla garland, from corōna crown