Extended Strong's Greek Lexicon (Abbott-Smith based)
epistle
Usage: ἐπι-στολή, -ῆς, ἡ (ἐπιατέλλω), [in LXX for אִגֶּרֶת, etc.; frequently in Mac ;] __1. a message. __2. a letter, an epistle: Act.9:2, 1Co.5:9, al.; pl., Act.22:5, 1Co.16:3, al.; ἐ. σνστατικαί, 2Co.3:1 (cf. Milligan, NTD, 254 f.). (On the NT ἐπιστολαί, cf. Milligan, Th., 121 ff.; NTD, 85 ff.; Deiss., BS, 3 ff.; St. Paul, 8 ff.) (AS)