(idiomatic) To reduce the amount of something by means of a control, such as the volume, heat, or light.
Turn down the television so I can hear myself think.
When it starts to boil, turn down the heat to a simmer.
Turn-down Sentence Examples
It has pleats, a button placket, turned up sleeves and a turn-down collar.
One he couldn't turn down.
If you are not using a wok, turn down the light to avoid burning the mixture.
The dark blue corduroy with a zipper up the front and a turn-down collar became the standard in 1993, and was part of a larger set of guidelines for dress by FFA members, found on the organization's official website.
Jerseys were effectively pullovers made of flannel with turn-down collars and button or lacing closures.