wakefulEnglishOxford Dictionary of Englishwakeful /ˈweɪkf(ʊ)l / ▸ adjective (of a person) unable or not needing to sleep: he had been wakeful all night. ▪ (of a period of time) passed with little or no sleep: wakeful nights. – DERIVATIVES wakefully adverb wakefulness /ˈweɪkf(ʊ)lnəs / noun