livelong /ˈlɪv.lɒŋ/adjective 2noun 1forms 1 adjective2 •Total, complete, whole.I've been working on the railroad, all the livelong day. •(no longer used) Lasting; durable.Thou, in our wonder and astonishment, Thou hast built thyself a live-long monument. — 1630 noun1 •Orpine (Hylotelephium telephium syn. Sedum telephium). formslivelongs