DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   GAD
       n 1: an anxiety disorder characterized by chronic free-floating
            anxiety and such symptoms as tension or sweating or
            trembling or lightheadedness or irritability etc that has
            lasted for more than six months [syn: generalized anxiety
    disorder, GAD, anxiety reaction]
       2: a sharp prod fixed to a rider's heel and used to urge a horse
          onward; "cowboys know not to squat with their spurs on" [syn:
          spur, gad]
       v 1: wander aimlessly in search of pleasure [syn: gallivant,
            gad, jazz around]