a speech, etc. at the beginning of a play, book or film that introduces it 序言;序幕;開場白 the Prologue to Chaucer’s ‘Canterbury Tales’ 喬叟的《坎特伯雷故事集》的序詩
Word OriginMiddle English: from Old French, via Latin from Greek prologos, from pro- ‘before’ + logos ‘saying’.