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"
A card that is more common than a common card but less common than a rare Uncommon cards are denoted by a diamond in the bottom righthand corner of the card
If you describe something as uncommon, you mean that it does not happen often or is not often seen. Cancer of the breast in young women is uncommon A 15-year lifespan is not uncommon for a dog. = unusual common
If you describe a quality, usually a good quality, as uncommon, you mean that it is unusually great in degree or amount. Both are blessed with uncommon ability to fix things She read Cecelia's last letter with uncommon interest. = unusual + uncommonly un·com·mon·ly Mary was uncommonly good at tennis. rare or unusual
Not common; unusual; infrequent; rare; hence, remarkable; strange; as, an uncommon season; an uncommon degree of cold or heat; uncommon courage
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"
To birders and ornithologists, a bird species which might be seen in a given locale at levels of no more than five birds daily; 5 to 25 times over the course of a season by an active observer Somewhat less commonly occurring species are termed Rare