Something that is long-lived lives or lasts for a long time. The flowers may only last a day but the plants are long-lived. huge piles of long-lived radioactive material. short-lived. living or existing for a long time short-lived
existing for a long time; "hopes for a durable peace"; "a long-lasting friendship"
Having a long life; having constitutional peculiarities which make long life probable; lasting long; as, a long-lived tree; they are a longlived family; long-lived prejudices