turndown

Noun

 * 1) A downturn.
 * 2) A rejection.
 * 3)  The service of turning down the bedcovers and often leaving chocolates, etc., on the pillow.
 * 4) A downward pointing extension to a vehicle muffler.
 * 5)  The operational range of a device.
 * 1) A downward pointing extension to a vehicle muffler.
 * 2)  The operational range of a device.

Adjective

 * 1) Capable of being turned down, or decreased in intensity.
 * a turndown lamp
 * 1) Made to wear with the upper part turned down.
 * a turndown collar