different from others of the same type in a way that is surprising, interesting, or attractive:
"Do you like the new couch?" "Yes, it's very unusual."
[ + to infinitive ] It's unusual to have adult conversation like that with such a young child.
I was actually on time, which is unusual for me.
More examples
Their kitchen is painted an unusual shade of yellow.
It's unusual to have a goalkeeper as the captain of a football team.
He uses a lot of unusual expressions.
There was nothing unusual about her physical appearance.
That's an unusual name - is it an Icelandic name?