correspondence

noun

1. 1

   compatibility of observations

   there was no agreement between theory and measurement

   the results of two tests were in correspondence

2. 2

   similarity by virtue of corresponding

3. 3

   (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane

4. 4

   communication by the exchange of letters

5. 5

   the relation of corresponding in degree or size or amount