What is the meaning of calm?

noun

• Steadiness of mind under stress.
  • usage: "he accepted their problems with composure and she with equanimity"
  • synonyms: composure, calmness, equanimity
• Wind moving at less than 1 knot; 0 on the Beaufort scale.
  • synonyms: calm air

verb

• Make calm or still.
  • usage: "quiet the dragons of worry and fear"
  • synonyms: calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still
• Make steady.
  • usage: "steady yourself"
  • synonyms: steady, becalm
• Become quiet or calm, especially after a state of agitation.
  • usage: "After the fight both men need to cool off."; "It took a while after the baby was born for things to settle down again."
  • synonyms: calm down, cool off, chill out, simmer down, settle down, cool it
• Cause to be calm or quiet as by administering a sedative to.
  • usage: "The patient must be sedated before the operation"
  • synonyms: sedate, tranquilize, tranquillize, tranquillise

adjective

• Not agitated; without losing self-possession.
  • usage: "spoke in a calm voice"; "remained calm throughout the uproar"; "he remained serene in the midst of turbulence"; "a serene expression on her face"; "she became more tranquil"; "tranquil life in the country"
  • synonyms: unagitated, serene, tranquil
• Of weather. ( free from storm or wind)
  • usage: "calm seas"