[Gorwingel]

To me the elves have always been beings who have extremely long lifespans and are not subject to sickness (except for sadness). But I also do consider them immortal because they do fit my definition of immortal. They don't age, they get to stay here forever, and we know where they go (when men die we don't really know where they go because Tolkien never really specified that, we can just guess). They also don't really age (well actually they kinda do) but not in the way that men do, don't they talk about how Galadriel becomes even more beautiful and noble as she ages.