turn up phrasal verb ( see also ↑ turn )
1 . turn something ↔ up to turn a switch on a machine such as an ↑ oven , radio etc so that it produces more heat, sound etc OPP turn down :
Turn the oven up to 220.
Turn up the radio!
2 . to be found, especially by chance, after having been lost or searched for:
Eventually my watch turned up in a coat pocket.
3 . to arrive at a place, especially in a way that is unexpected:
You can’t just turn up and expect a meal.
turn up late/early/on time etc
Steve turned up late, as usual.
4 . if an opportunity or situation turns up, it happens, especially when you are not expecting it:
Don’t worry, I’m sure a job will turn up soon.
5 . turn something ↔ up to find something by searching for it thoroughly:
The police investigation hasn’t turned up any new evidence.
6 . turn something ↔ up British English to shorten a skirt, trousers etc by folding up the bottom and sewing it
⇨ turn up trumps at ↑ trump 1 (4)