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[kawr-uh-ler-ee, kor-; especially British, kuh-rol-uh-ree] /ˈkɔr əˌlɛr i, ˈkɒr-; especially British, kəˈrɒl ə ri/
noun, plural corollaries.
Mathematics. a proposition that is incidentally proved in proving another proposition.
an immediate consequence or easily drawn conclusion.
a natural consequence or result.
Origin of corollary
1325-75; Middle English < Late Latin corollārium corollary, in Latin: money paid for a garland, a gift, gratuity. See corolla, -ary Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for corollary
Contemporary Examples
Historical Examples
  • It became orthodox common law that liability was a corollary of fault.

  • For she had forgotten that a proposition is generally provided with a corollary.

    The Doomsman Van Tassel Sutphen
  • This leads to the corollary concerning the lateral area of the frustum of a regular pyramid.

    The Teaching of Geometry David Eugene Smith
  • The old man was wealthy, and a miser, each of which characteristics may be corollary to the other.

    Grey Town Gerald Baldwin
  • True, they had built labourers' cottages, but that was a corollary of Land Purchase.

British Dictionary definitions for corollary


noun (pl) -laries
a proposition that follows directly from the proof of another proposition
an obvious deduction
a natural consequence or result
consequent or resultant
Word Origin
C14: from Latin corollārium money paid for a garland, from Latin corolla garland, from corōnacrown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for corollary

late 14c., from Late Latin corollarium "a deduction, consequence," from Latin corollarium, originally "money paid for a garland," hence "gift, gratuity, something extra;" and in logic, "a proposition proved from another that has been proved." From corolla "small garland," diminutive of corona "crown" (see crown (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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corollary in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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