1. A letter, especially a formal one. See synonyms at letter. 2. A literary composition in the form of a letter. 3.EpistleBiblea. One of the letters included as a book in the New Testament. b. An excerpt from one of these letters, read as part of a religious service.
ETYMOLOGY:
Middle English epistel, from Old French epistle, from Latin epistola, from Greek epistol, from epistellein, to send a message to : epi-, epi- + stellein, to send; see stel- in Appendix I.