quieten down

Verb

quieten down (third-person singular simple present quietens down, present participle quietening down, simple past and past participle quietened down)

1. (UK, intransitive) To become quieter.
   • As the lights dimmed the audience quietened down.
2. (UK, intransitive) To reduce intensity of an activity.
   • Diplomacy can only begin when the violence quietens down.
3. (UK, transitive) To make someone or something become quieter.
   • The teacher did her best to quieten the children down.