Wordnet 3.0
NOUN (1)
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]
WordNet (r) 3.0 (2006):
generalized anxiety disorder
    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]