The Collaborative International Dictionary of English v.0.48:
long-lasting \long-lasting\ adj. Existing or persisting for a long time; as, a long-lasting friendship. Syn: durable, lasting, long-lived. [WordNet 1.5]WordNet (r) 3.0 (2006):
long-lasting adj 1: existing for a long time; "hopes for a durable peace"; "a long-lasting friendship" [syn: durable, lasting, long-lasting, long-lived]