What is the meaning of blustering?

verb

• Blow hard; be gusty, as of wind.
  • usage: "A southeaster blustered onshore"; "The flames blustered"
  • synonyms: bluster
• Show off.
  • synonyms: boast, tout, swash, shoot a line, brag, gas, blow, bluster, vaunt, gasconade
• Act in an arrogant, overly self-assured, or conceited manner.
  • synonyms: swagger, bluster, swash

adjective

• Blowing in violent and abrupt bursts.
  • usage: "blustering (or blusterous) winds of Patagonia"; "a cold blustery day"; "a gusty storm with strong sudden rushes of wind"
  • synonyms: blusterous, blustery