Livelong/ˈlɪvlɔːŋ/ Definition 1 of 2Pro Tip 1/3Seemingly Endless Used to express a duration that feels very long, often exaggerated. She talked about her favorite topic for the livelong evening. Pro Tip 2/3Not Literal Though it means lengthy, 'livelong' isn't usually used for precise times. The children pleaded for ice cream the livelong afternoon. Pro Tip 3/3Emotional Emphasis Can imply irritation or exhaustion from the wait or duration. He sighed as he scrolled through the livelong document.