eighteenth
ordinal number uk/ˌeɪˈtiːnθ/ us/ˌeɪˈtiːnθ/
第十八（的）
18th written as a word
Next Monday is the eighteenth (of February). 下周一是（2月）18日
eighteenth
noun [ C ] uk/ˌeɪˈtiːnθ/ us/ˌeɪˈtiːnθ/
十八分之一
one of 18 equal parts of something