EPISTOLARY Meaning of EPISTOLARY in English e ‧ pis ‧ to ‧ la ‧ ry /ɪˈpɪstələri $ -leri/ BrE AmE adjective formal written in the form of a letter or a series of letters:an epistolary novel Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012