[ kong-groo-uh nt, kuh n-groo-, kuh ng- ]
/ ˈkɒŋ gru ənt, kənˈgru-, kəŋ- /


agreeing; accordant; congruous.
Mathematics. of or relating to two numbers related by a congruence.
Geometry. coinciding at all points when superimposed: congruent triangles.

Origin of congruent

1375–1425; late Middle English < Latin congruent- (stem of congruēns, present participle of congruere to come together, fit in, agree), equivalent to con- con- + -gru- base of uncertain meaning (attested only in this v. and ingruere to fall upon) + -ent- -ent
Related formscon·gru·ent·ly, adverbnon·con·gru·ent, adjectivenon·con·gru·ent·ly, adverb
Can be confusedcongruous congruent incongruous incongruent Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for congruent

British Dictionary definitions for congruent


/ (ˈkɒŋɡrʊənt) /


agreeing; corresponding; congruous
having identical shapes so that all parts correspondcongruent triangles Compare similar (def. 2)
of or concerning two integers related by a congruence
Derived Formscongruently, adverb

Word Origin for congruent

C15: from Latin congruere to meet together, agree
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

Word Origin and History for congruent



early 15c., "suitable, proper," from Latin congruentem (nominative congruens) "agreeing, fit, suitable," present participle of congruere, literally "to come together, agree, correspond with," from com- "with" (see com-) + a lost verb *gruere, *ruere "fall, rush," perhaps from PIE *ghrei- "to rub, grind" (see chrism). Geometry sense attested by 1706.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for congruent


[ kŏnggrōō-ənt, kən-grōōənt ]

Relating to geometric figures that have the same size and shape. Two triangles are congruent, for example, if their sides are of the same length and their internal angles are of the same measure.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.