The term "ouverture" refers to the opening section of a musical composition, particularly in classical music. It often serves as an introduction to an opera or orchestral suite, setting the tone and mood for the piece. The ouverture typically features themes that will be developed throughout the work, allowing listeners to anticipate the musical journey ahead. In the context of opera, an ouverture can be instrumental or include vocal elements. Famous examples include the Overture to The Marriage of Figaro by Wolfgang Amadeus Mozart and the Overture to William Tell by Gioachino Rossini. These pieces are celebrated for their ability to engage audiences right from the start.