- the quality or state of agreeing or corresponding.
- Mathematics. a relation between two numbers indicating that the numbers give the same remainder when divided by some given number.Compare residue(def 4b).
- the quality or state of corresponding, agreeing, or being congruent
- maths the relationship between two integers, x and y, such that their difference, with respect to another positive integer called the modulus, n, is a multiple of the modulus. Usually written x ≡ y (mod n), as in 25 ≡ 11 (mod 7)
n.mid-15c., from Latin congruentia “agreement, harmony, congruity,” from congruentem (nominative congruens), present participle of congruere “to come together” (see congruent). Related: Congruency.