Term of address.
"Lively, come here and help me carry these boxes!"
full of life and energy
"a lively discussion"
"lively and attractive parents"
"a lively party"
Full of life; energetic.
"The children ran through the park, their laughter making the scene feel lively and full of energy."
Vigorously.
"The boxer moved vigorously across the ring, landing powerful punches on every exchange."
A surname.
"Mr. Lively was invited to speak at the family reunion, but everyone forgot his first name and kept calling him Mr. Smith."
The word "lively" comes from Middle English lyvely, which was derived from the Old English term meaning "living," "long-lived," or "vital." It entered modern usage as a doublet related to words like lifely and lifelike.