A course of study where instruction is conducted via mail or online rather than in person.

The act of communicating by exchanging letters or emails.

पत्राचार करना

English Usage: Their correspondence course included weekly assignments.

Hindi Usage: उनके पत्राचार करने के पाठ्यक्रम में साप्ताहिक असाइनमेंट शामिल थे।