Short definition
Multiple layers of aromas and flavors that shift and evolve as you taste and as the wine sits in the glass.
A simple wine tastes like one thing — maybe cherry, maybe apple. A complex wine keeps revealing new layers: first black cherry, then tobacco, then a whiff of dried herbs, then a chalky mineral finish. Swirl it, wait five minutes, and it shows something else again. Age, terroir, and careful winemaking all contribute.