1 (used about a period at night) spent with little or no sleep ﹙夜间一段时间﹚没怎么睡的，不眠的: She had spent many wakeful nights worrying about him. 她度过了许多不眠之夜，为他担心受怕。

2 not sleeping; unable to sleep 失眠的；不能入睡的: The baby was wakeful and fussy. 婴儿一直没有睡着，表现得紧张不安。