Definition from Wiktionary, the free dictionary
- (intransitive, Britain) To become quieter.
- As the lights dimmed the audience quietened down.
- (intransitive, Britain) To reduce intensity of an activity.
- Diplomacy can only begin when the violence quietens down.
- (transitive, Britain) To make someone or something become quieter.
- The teacher did her best to quieten the children down.
- quiet down (preferred in US)