The Idiom Attic - a collection of hundreds of English idioms, each one explained.
The meaning of "dial down"
" Dial down "
Meaning:
1. Adjust a device to reduce sound or temperature. 2. Reduce one's emotional reaction to something.
Example:
1. It's boiling in here. Just dial down the thermostat would you? 2. Okay, so your favourite didn't win X-Factor. No need to bite the carpet - just dial it down a notch.