Definitions
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.noun(used in the vocative) A term of address for someone, typically a man, particularly when cautioning him or offering him advice."Dude, I'd be careful around the principal; he's having a bad day."
3.nounAn inexperienced cowboy.
4.nounA tourist.
5.nounA man who is very concerned about his dress and appearance; a dandy, a fop.
6.verbTo address someone as dude.
7.verbTo take a vacation in a dude ranch.
8.verbUsually followed by up: to dress up, to wear smart or special clothes.
9.interjectionA term of address, usually for a man, conveying awe, excitement, surprise, etc."Dude! You finally called!"