A man, generally a younger man.
An inexperienced cowboy.
A tourist.
A term of address for someone, typically a man, particularly when cautioning them or offering advice.
Usually followed by up: to dress up, to wear smart or special clothes.
To take a vacation in a dude ranch.
To address someone as dude.
A term of address, usually for a man, conveying awe, excitement, surprise, annoyance, etc.
One's sibling or kin via a godfamily tie: one's or one's child's godparent, or one's godchild's parent, or one's godparent's child.