(formal or humorous)a letter (正式,幽默)书信 ■a poem or other literary work in the form of a letter or series of letters 书信体诗文 ■(Epistle)a book of the New Testament in the form of a letter from an Apostle 使徒书(《圣经•新约》中使徒以书信形式写的一卷) St Paul's Epistle to the Romans. 圣•保罗写给罗马人的使徒书。 ■an extract from an Epistle (or another New Testament book not a Gospel) that is read in a church service (做礼拜时诵读的)使徒书信摘录
语源
Old English, via Latin from Greek epistolē, from epistellein 'send news', from epi 'upon, in addition' + stellein 'send'. The word was reintroduced in Middle English from Old French