settle down settle down /ˈsɛtəl daʊn/

verb

1. () Become settled or established and stable in one's residence or life style  ( root , steady down , settle , settle down , take root )
   become settled or established and stable in one's residence or life style
    He finally settled down
   He finally settled down
   
2. () Settle into a position, usually on a surface or ground  ( settle down , settle )
   settle into a position, usually on a surface or ground
    Dust settled on the roofs
   dust settled on the roofs
   
3. () Become quiet or calm, especially after a state of agitation  ( calm , chill out [Informal] , cool it [Informal] , calm down , cool off , settle down , simmer down , take a chill pill [Informal] )
   become quiet or calm, especially after a state of agitation
    After the fight both men need to cool off.
   After the fight both men need to cool off.
    It took a while after the baby was born for things to settle down again.
   It took a while after the baby was born for things to settle down again.