Source : Webster's Revised Unabridged Dictionary (1913)

Hairless \Hair"less\, a.
   Destitute of hair. --Shak.

Source : WordNet®

hairless
     adj : having no hair or fur; "a Mexican Hairless is about the size
           of a fox terrier and hairless except for a tufts on the
           head and tail" [ant: {hairy}]