Source : Webster's Revised Unabridged Dictionary (1913)

Perturbed \Per*turbed"\, a.
   Agitated; disturbed; troubled. --Shak. -- {Per*turb"ed*ly},
   adv.

Source : WordNet®

perturbed
     adj : thrown into a state of agitated confusion; (`rattled' is an
           informal term) [syn: {flustered}, {hot and bothered(p)},
            {rattled}]