<p><strong>Noun</strong></p><ul><li>the quality or state of agreeing or corresponding.</li><li>Mathematics: a relation between two numbers indicating that the numbers give the same remainder when divided by some given number.</li><li>Geometry: 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.</li></ul>