live·long /ˈlɪvlɒŋ $ -lɒːŋ/ adjectiveadj all the livelong day old-fashionedLONG TIME a phrase meaning ‘all day’, used when this seems like a long time to you 整整一天〔用于指时间似乎很漫长时)all the livelong day• Just went around in my wrapper all the livelong day, my mama would faint.