1. 
[syn: indignant, incensed, outraged, umbrageous]
The Collaborative International Dictionary of English v.0.48:
outraged \out"raged\ adj.
   deeply angered at something unjust or wrong; incensed; as, a
   look of outraged disbelief.
   Syn: indignant, incensed, umbrageous.
        [WordNet 1.5]
WordNet (r) 3.0 (2006):
outraged
    adj 1: angered at something unjust or wrong; "an indignant
           denial"; "incensed at the judges' unfairness"; "a look of
           outraged disbelief"; "umbrageous at the loss of their
           territory" [syn: indignant, incensed, outraged,
           umbrageous]