turn something up

Từ điển Oxford Advanced Learner 8th

ˌturn sthˈup derived
1. to increase the sound, heat, etc. of a piece of equipment
• Could you turn the TV up?
•+ adj. The music was turned up loud.
2. (BrE)to make a piece of clothing shorter by folding and sewing it up at the bottom
Opp: let down
related noun ↑turn-up
3. to find sth
•Our efforts to trace him turned up nothing.
Main entry: ↑turn_derived