I view word definitions as an amalgamation of the dictionary, everyday use (as I see it, that is, in my own environment) and as a kind of vernacular meme.
I view a myth as something invariant of time. If there was a "myth" of x in anno 1600, but x actually existed, the "myth" but a spreading rumor, then I would not consider x to be a myth. I define a myth as something tangible (in the same way a deity is tangible) based purely on belief, regardless of if something "similar" actually exists. The giant squid or krakan of Verne's classic work is myth, but the giant squid architeuthis n. are fact. I recognize these as seperate entities. The belief is the myth, while the fact remains just that -- fact -- invariant of how its percieved in literary, vernacular, traditional, or media outlets.
Maintaining my first post in this thread, "
Well, if they're mythical creatures, obviously they do not exist outside of myth, else it would negate such a term." Basically, this is what I've been arguing the entire time. Washington is not a mythical creature. He existed. The exaggerated or untrue coeval perceptions of him would be mythical, but the actual person himself was not, and is not, a myth.
And yes, I fully recognize the circular fallacy that exists in my temporally-invariant definition that hasn't been explicitly pointed out yet. It's still fun to debate.