赋格是复音音乐的一种固定的创作形式，而不是一种曲式。

赋格的主要特点是相互模仿的声部在不同的音高和时间相继进入，按照对位法组织在一起。

赋格(英:fugue, 德:fuge, 法:fugue, 意:fuga)一词的来源有多种说法，一般认为是来自于拉丁语，原意是“追逐”和“飞翔”。赋格经历了漫长的历史发展时期，从16世纪的宗教音乐就开始有这种作曲方法，一直到17世纪巴赫时代才达到顶峰。

In music, a fugue (/fjuːɡ/ FEWG) is a contrapuntal compositional technique in two or more voices, built on a subject (a musical theme) that is introduced at the beginning in imitation (repetition at different pitches) and which recurs frequently in the course of the composition. A fugue usually has three sections: an exposition, a development, and a final entry that contains the return of the subject in the fugue's tonic key. Some fugues have a recapitulation. In the Middle Ages, the term was widely used to denote any works in canonic style; by the Renaissance, it had come to denote specifically imitative works. Since the 17th century, the term fugue has described what is commonly regarded as the most fully developed procedure of imitative counterpoint.