Lively/ˈlaɪvli/ Definition 1 of 4Pro Tip 1/2Positive Vibe Used to describe someone's cheerful and energetic nature that brightens the atmosphere. Her lively spirit lifted the mood of the entire team. Pro Tip 2/2Youthful Impression Implies a young or youthful spirit, regardless of a person's actual age. Despite his age, he showed a lively step as he danced.