a dialect of Chinese spoken in the Yangtze delta

Wu (吳方言 pinyin wú fāng yán; 吳語 pinyin wú yǔ; Latin method wu gnu(niu)) is one of the major divisions of the Chinese language. It is spoken in most of Zhejiang province, the municipality of Shanghai, southern Jiangsu province, as well as smaller parts of Anhui, Jiangxi, and Fujian provinces. Major Wu dialects include those of Shanghai, Suzhou, Wenzhou, Hangzhou, Yongkang and Shaoxing.

Wu (吳) is a region in the Jiangnan area (the south of Yangtze River), surrounding Suzhou, in Jiangsu province of China. It is also the abbreviation of several kingdoms or states based in Wu. The largest city in the Wu region today is Shanghai.

Wu was a state during the Spring and Autumn Period in China. The state of Wu straddled the mouth of the Yangtze River (Chang Jiang) east of the State of Chu. Considered a semi-barbarian state by ancient Chinese historians, its capital was Suzhou.

Wu is the Pinyin transliteration of the Chinese surname 吳 (Traditional Chinese), 吴 (Simplified Chinese), which is 10th most common surname in Mainland China. Several other, less common Chinese surnames are also translated into English as "Wu": 武, 伍, 仵, 烏, and 鄔.

Wu 吳 (also referred to as Huainan 淮南) was one of the Ten Kingdoms in south-central China which was in existence between the years of 904 and 937. Its capital was Guangling 廣陵 or Jiangdu 江都 (modern Yangzhou 揚州 in Jiangsu Province). It was replaced by Nantang (Southern Tang) in 937.