uncommon in WordNet English dictionary

1. marked by an uncommon quality; especially superlative or extreme of its kind
   "what is so rare as a day in June"-J.R.Lowell; "a rare skill"; "an uncommon sense of humor"; "she was kind to an uncommon degree"
   rare  uncommon 
   
2. not common or ordinarily encountered; unusually great in amount or remarkable in character or kind
   "uncommon birds"; "frost and floods are uncommon during these months"; "doing an uncommon amount of business"; "an uncommon liking for money"; "he owed his greatest debt to his mother's uncommon character and ability"
   uncommon