- the quality or state of agreeing or corresponding.
- a relation between two numbers indicating that the numbers give the same remainder when divided by some given number.
- the relationship that exists between two figures when one can be superimposed over the other and all their angles and sides coincide, as a mirror image: the congruence of trapezoids with identical measurements.
- the quality or state of corresponding, agreeing, or being congruent
- 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)
