n.1 (usu. foll. by with, to, between) agreement, similarity, or harmony.
2 a communication by letters. b letters sent or received.
Phrases and idioms:
correspondence college (or school) a college conducting correspondence courses. correspondence column the part of a newspaper etc. that contains letters from readers. correspondence course a course of study conducted by post.
Etymology: ME f. OF f. med.L correspondentia (as CORRESPOND)