correspondence

correspondence /ˌkorəˈspɑːndəns/ noun
plural correspondences
correspondence
/ˌkorəˈspɑːndəns/
noun
plural correspondences
Britannica Dictionary definition of CORRESPONDENCE
1 
: the activity of writing letters or e-mails to someone
[noncount]
[singular]
2 
[noncount] : the letters or e-mails that people write to each other
3 
: a direct relationship to or with something or between two things
[noncount]
[count]
4 
: the fact of being similar or equal to something
[noncount]
[count]