Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Corresponding; congruous.
  • adj. Mathematics Coinciding exactly when superimposed: congruent triangles.
  • adj. Mathematics Of or relating to two numbers that have the same remainder when divided by a third number. For example, 11 and 26 are congruent when the modulus is 5.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Corresponding in character.
  • adj. harmonious
  • adj. Having a difference divisible by a modulus.
  • adj. Coinciding exactly when superimposed.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Possessing congruity; suitable; agreeing; corresponding.

from The Century Dictionary and Cyclopedia

  • Harmoniously joined or related; agreeing; corresponding; appropriate.
  • In mathematics, in the relation of congruence: thus, one number is said to be congruent to another relatively to a third, called the modulus, when the first two numbers on being divided by the modulus give the same remainder.
  • In logic, predicable of the same subject, as terms, or true of the same state of things, as propositions.
  • Tn grammar, accordant; agreeing.
  • In geometry, identical in shape and size.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. coinciding when superimposed
  • adj. corresponding in character or kind

Etymologies

Middle English, from Latin congruēns, congruent-, present participle of congruere, to agree.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Middle English, from Latin congruēns, present active participle of congruō ("meet together, agree"). (Wiktionary)

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