吴楚 Traditional form: 吳楚 Pinyin (reading): Wú Chǔ Definitions: southern states of Wu and Chu the middle and lower Yangtze valley Characters: 吴 - one of several warring states; surname 楚 - clear, distinct; pain, suffering; surname Traditional characters: 吳 - one of several warring states; surname 楚 - clear, distinct; pain, suffering; surname