the quality or state of agreeing or corresponding.
2.
Mathematics. a relation between two numbers indicating that the numbers give the same remainder when divided by some given number. Compare residue( def 4b ).
Origin: 1400–50;late Middle English < Latincongruentia, derivative of congruent-congruent; see -ence
the quality or state of corresponding, agreeing, or being congruent
2.
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)