v.1. To rotate something so as to expose the underside: We turned up the soil in the garden to prepare it for planting. I turned the log up and found hundreds of bugs underneath.
2. To bring something that is underneath to the surface: The plow had turned up a number of rocks, and we collected them for use in the wall. The children turned the shells up while they were digging in the sand.
3. To come to the surface: A large rock turned up during the excavation.
4. To increase the speed, volume, intensity, or flow of something by or as if by turning a dial: I think we should turn up the temperature in the oven. Turn the radio up so we can hear it outside.
5. To be found, especially without searching: Don't worry about losing your keys—I'm sure they'll turn up somewhere.
6. To make an appearance; arrive: Many old friends turned up at the reunion.
7. To fold something upward or so that the inside is exposed: I turned the cuffs of my pants up and walked through the puddle. We turned up our collars and headed out into the rain.
8. To happen unexpectedly: Something turned up at the office, and we had to stay later than usual.
9. To be evident or easily encountered: That sculptor's name turns up in the art community.