Definitions of flourish:

• noun:   (music) a short lively tune played on brass instruments

  Example: "He entered to a flourish of trumpets"

• noun:   the act of waving
• noun:   a display of ornamental speech or language
• noun:   a showy gesture

  Example: "She entered with a great flourish"

• noun:   an ornamental embellishment in writing
• verb:   move or swing back and forth
• verb:   gain in wealth
• verb:   grow stronger