The Amoy dialect or Xiamen dialect (), also known as Amoynese, Amoy Hokkien, Xiamenese or Xiamen Hokkien, is a dialect of Hokkien spoken in the city of Xiamen (historically known as "Amoy") and its surrounding metropolitan area, in the southern part of Fujian province. Currently, it is one of the most widely researched and studied varieties of Southern Min. It has historically come to be one of the more standardized varieties.
Amoynese and Taiwanese are both historically mixtures of Quanzhou and Zhangzhou dialects. As such, they are very closely aligned phonologically. There are some differences between the two, especially lexical, as a result of physical separation and the differing histories of mainland China and Taiwan during the 20th century. Amoynese and Taiwanese are mutually intelligible. Intelligibility with other Hokkien, especially inland, is more difficult. By that standard, Amoynese and Taiwanese may be considered dialects of a single language. Ethnolinguistically, however, Amoynese is part of mainland Hokkien.
In 1842, as a result of the signing of the Treaty of Nanking, Amoy was designated as a trading port in Fujian. Amoy and Kulangsu rapidly developed, which resulted in a large influx of people from neighboring areas such as Quanzhou and Zhangzhou. The mixture of these various accents formed the basis for the Amoy dialect.
Over the last several centuries, a large number of Southern Fujianese people from these same areas migrated to Taiwan during Dutch and Qing rule. The "Amoy dialect" was considered the vernacular of Taiwan. Eventually, the mixture of accents spoken in Taiwan became popularly known as Taiwanese during Imperial Japanese rule. As in American and British English, there are subtle lexical and phonological differences between modern Taiwanese and Amoy Hokkien; however, these differences do not generally pose any barriers to communication. Amoy dialect speakers also migrated to Southeast Asia, mainly in the Philippines (where it is known as Lán-nâng-ōe), Indonesia, Malaysia and Singapore.