What is the meaning of flourish?

noun

• A showy gesture.
  • usage: "she entered with a great flourish"
• An ornamental embellishment in writing.
• A display of ornamental speech or language.
• The act of waving.
  • synonyms: brandish
• Music) a short lively tune played on brass instruments. (
  • usage: "he entered to a flourish of trumpets"; "her arrival was greeted with a rousing fanfare"
  • synonyms: fanfare, tucket

verb

• Grow vigorously.
  • usage: "The deer population in this town is thriving"; "business is booming"
  • synonyms: boom, thrive, expand
• Make steady progress; be at the high point in one's career or reach a high point in historical significance or importance.
  • usage: "The new student is thriving"
  • synonyms: thrive, prosper, fly high
• Move or swing back and forth.
  • usage: "She waved her gun"
  • synonyms: brandish, wave