correspondence correspondence /ˌkɔrəˈspɑːndəns/

noun

1. () Communication by the exchange of letters  ( correspondence )
   communication by the exchange of letters
   
2. () Compatibility of observations  ( correspondence , agreement )
   compatibility of observations
    There was no agreement between theory and measurement
   there was no agreement between theory and measurement
    The results of two tests were in correspondence
   the results of two tests were in correspondence
   
3. Similarity by virtue of corresponding  ( correspondence , parallelism )
   similarity by virtue of corresponding
   
4. (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane  ( balance , correspondence , symmetricalness , symmetry )
   (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane
     The artwork showcased perfect symmetry in its design.
   The artwork showcased perfect symmetry in its design.
   
   
5. The relation of corresponding in degree, size or amount  ( commensurateness , correspondence , proportionateness )
   the relation of corresponding in degree, size or amount