Ok, that's a little different. Druid is certainly a valid in-game designation for a type of person, who may or may not have levels in the Druid class, but usually will.

I'd say that if there are in-game connotations that go along with being a druid, they're probably common knowledge in the game world (at least among druids) and you should ask your DM what they are, so that you can roleplay appropriately.