Short definition
Complex scents that develop in wine through aging and winemaking, distinct from grape-derived aromas.
While aroma comes from the grape, bouquet comes from time. Oxidation, barrel aging, and bottle aging create scents like leather, cigar box, dried flowers, mushroom, and truffle that were never in the original fruit. A five-year-old Rioja Reserva has bouquet. A fresh rosé does not. Both can be excellent — bouquet is about style, not rank.