1. (verb)calm, calm down, cool off, chill out, simmer down, settle down, cool it become quiet or calm, especially after a state of agitation "After the fight both men need to cool off."; "It took a while after the baby was born for things to settle down again."
2. (verb)calm, calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still makecalm or still "quiet the dragons of worry and fear"
3. (verb)lull, calm down become quiet or less intensive "the fighting lulled for a moment"
Definition of 'calm down':
