# congruence

> English word · Noun · IPA /ˈkɒŋ.ɡɹʊ.əns/ · frequency rank #56,678

## Definitions
1. The quality of agreeing or corresponding; being suitable and appropriate.
2. A relation between two numbers indicating they give the same remainder when divided by some given number.
3. The quality of being isometric — roughly, the same measure and shape.
4. Matrix similarity by an orthogonal matrix.
5. Any equivalence relation defined on an algebraic structure which is preserved by operations defined by the structure.
6. A well-adjusted state or condition in which people are not lying to themselves or in denial.

## Etymology
From Middle English congruence, from Latin congruentia (“agreement”), from congruēns, present active participle of congruō (“meet together, agree”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/congruence