Definitions for quieten down
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Kernerman English Learner's Dictionary
quieten down(verb)ˈkwaɪ ɪt
to become or make quiet or calm
They waited for the music to quiet down.
Wiktionary
quieten down(Verb)
To become quieter
quieten down(Verb)
To reduce intensity of an activity.
quieten down(Verb)
To make someone or something become quieter.
Citation
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"quieten down." Definitions.net. STANDS4 LLC, 2013. Web. 23 May 2013. <http://www.definitions.net/definition/quieten down>.

