[1] : The Collaborative International Dictionary of English v.0.48

dude \dude\, n.
   a kind of dandy; especially, one characterized by an
   ultrafashionable style of dress and other affectations.
   recent
   1913 webster

         the social dude who affects english dress and english
         drawl.                                   --the
                                                  american.
   1913 webster

[2] : WordNet (r) 2.0

dude
     n : a man who is much concerned with his dress and appearance
         syn: dandy, fop, gallant, sheik, beau, swell,
          fashion plate, clotheshorse
see also:
dandy fop gallant sheik beau swell 
fashion plate clotheshorse 

[3] : Moby Thesaurus II by Grady Ward, 1.0

31 moby thesaurus words for "dude":
   beau brummel, beau, blade, blood, boulevardier, buck, chap,
   clotheshorse, coxcomb, dandy, exquisite, fashion plate, fellow,
   fine gentleman, fop, fribble, gallant, guy, jack-a-dandy,
   jackanapes, lady-killer, lounge lizard, macaroni, man,
   man-about-town, masher, popinjay, puppy, spark, sport, swell

Dude >> D Words
Dude, definition of term: Dude
dude_pag1.html

Dude Ranch >> D Words
Dude Ranch, definition of term: Dude Ranch
dude+ranch_pag1.html