Source : Webster's Revised Unabridged Dictionary (1913)

Fad \Fad\, n. [Cf. {Faddle}.]
   A hobby; freak; whim. -- {Fad"dist}, n.

         It is your favorite fad to draw plans.   --G. Eliot.

Source : WordNet®

fad
     n : an interest followed with exaggerated zeal; "he always
         follows the latest fads"; "it was all the rage that
         season" [syn: {craze}, {furor}, {furore}, {cult}, {rage}]

Source : Free On-Line Dictionary of Computing

FAD
     
        ["FAD, A Simple and Powerful Database Language", F. Bancilon
        et al, Proc 13th Intl Conf on VLDB, Brighton, England, Sep
        1987].