From Longman Dictionary of Contemporary Englishepistolarye‧pis‧to‧la‧ry /ɪˈpɪstələri $ -leri/ adjective formal ALwritten in the form of a letter or a series of letters an epistolary novel
Examples from the Corpus
epistolary• She is in no real need of epistolary adulation.• Richardsonian Principle, the, allusion to the fact that Samuel Richardson's novels are all epistolary in form.• It is an attempt to reuse the fictional form which first reached exhaustion, that of the epistolary novel.• The discovery of her own capacity for longing catapults Sabrina into a kind of epistolary sublime. 