Triton Island noun1 •An island of the Paracel Islands in the South China Sea administered under Sansha, Hainan, China (claimed by Taiwan (ROC) and Vietnam).On the 16th inst., they arrived at the Paracels, where they found the Phra Nang in the same position as before—aground on a coral reef on Triton Island, the south-western unit of the group. — 1902
