quiet down

Verb

quiet down (third-person singular simple present quiets down, present participle quieting down, simple past and past participle quieted down)

1. (US, intransitive) To become quieter.
   • As the lights dimmed the general noise quieted down.
2. (US, transitive) To make someone or something become quieter.
   • The teacher did her best to quiet the children down.
3. (US, intransitive, transitive) To diminish in intensity.
   • Diplomacy can only begin when the violence quiets down.