1. A close similarity, equivalence, or connection: The correspondence of Brandon's writing objectives with those of his wife made their lives more comprehensible and harmonious.
2. The communication or the exchanges of messages via computers or letters with other people: Bruce's military wife, who is overseas, really enjoys the correspondence she receives from her husband and two children.

E-mails and telephone calls provide important correspondences that are very important for personal contacts and for businesses that need to provide faster services to their customers than normal postal methods can deliver.