Source : Webster's Revised Unabridged Dictionary (1913)

Delirious \De*lir"i*ous\, a. [From {Delirium}.]
   Having a delirium; wandering in mind; light-headed; insane;
   raving; wild; as, a delirious patient; delirious fancies. --
   {De*lir"i*ous*ly}, adv. -- {De*lir"i*ous*ness}, n.

Source : WordNet®

delirious
     adj 1: experiencing delirium [syn: {hallucinating}]
     2: marked by uncontrolled excitement or emotion; "a crowd of
        delirious baseball fans"; "something frantic in their
        gaiety"; "a mad whirl of pleasure" [syn: {excited}, {frantic},
         {mad}, {unrestrained}]