Definitionen
1.NounA man, generally a younger man."So we were at the mall and these two dudes just walk up to us and say "hi"."
2.NounA term of address for someone, often but not exclusively a man, particularly when hailing, cautioning them or offering advice."Hey, dude, how's it going?; Dude, I'd be careful around the principal; he's having a bad day.; Watch it, dude; you almost knocked me over."
3.NounA tourist.
4.NounA birder who has expensive clothing and equipment, but scant knowledge of birds, their fieldmarks, habits, etc.
5.NounA man who is very concerned about his dress and appearance; a dandy, a fop.
6.InterjectionA term of address, usually for a man, conveying awe, excitement, surprise, annoyance, etc."Dude! You finally called!"
7.VerbTo address someone as dude.
8.VerbTo take a vacation in a dude ranch.
9.VerbUsually followed by up: to dress up, to wear smart or special clothes.