eighteen/͵eˋtin; ˌeIˈtiːn◄/number the number 18 十八: Eighteen people were hurt. 18 个人受伤。Jim is eighteen (=18 years old). 吉姆 18 岁。—eighteenth adj , pron : his eighteenth birthday 他的 18 岁生日I’m leaving on the eighteenth (=the 18th day of the month). 我 18 号走。