Become quiet or calm, especially after a state of agitation. Synonyms:calm, calm down, chill out, cool it, cool off, settle down."It took a while after the baby was born for things to settle down again."
... was too wise to call a Scout meeting immediately; she wanted to give the discussion a chance to simmer down. Besides this, she felt deeply for Marjorie. The girl had encountered a terrible disappointment; older and more experienced people than Marjorie had broken down under parallel circumstances. Miss Phillips ... — The Girl Scouts' Good Turn • Edith Lavell
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