eleventh       
 ordinal number uk/ɪˈlev.ənθ/ us/əˈlev.ənθ/
 第十一(的)
11th written as a word
  Her birthday is on the eleventh (of this month). 她的生日在十一号。 
 Idiom   
the eleventh houridiom  最后一刻,最后时刻
the last moment or almost too late
  We only received the signatures at the eleventh hour. 我们在最后一刻才收到签字。 
 an eleventh-hour decision by the union to call off the strike 工会在最后一刻作出的取消罢工的决定 
 eleventh      
noun [ C ] uk/ɪˈlev.ənθ/ us/əˈlev.ənθ/
 十一分之一
one of eleven equal parts of something