Non-vintage Champagne wines are blended from different crus (growths), different cépages (grape varieties) and different millésimes (years). In exceptional years, the winemaker may decide to blend only the grapes from that year. This is what is known as a "Champagne Millésimé", or Vintage Champagne.
When it comes to Champagne, the word "cuvée" may refer either to the first-pressed juice (20.5 hectoliters per 4,000kg marc) or to the finished blend.