Rarely occurring or appearing
Far beyond what is usual, normal, or customary
It was not an uncommon reaction.
That is the uncommon school we want.
The soil is mostly sand, clay (brick-clay and potter's-clay are not uncommon), and peat-bogs,with a few patches of "black earth."
Heavy falls of snow in June are not uncommon, and only for a short time towards the end of July are the nights totally exempt from light frosts.
I suppose Snowball would be a common name, and she's certainly an uncommon cat.