1.
to be found, especially by chance, after being lost :
Don't worry about the letter—I'm sure it'll turn up.
2.
( of a person ) to arrive :
We arranged to meet at 7.30, but she never turned up.
3.
( of an opportunity ) to happen, especially by chance :
He's still hoping something (= for example, a job or a piece of luck) will turn up.
—related noun turn-up