What labelling term might indicate that a Sauvignon Blanc has been matured or fermented in oak?

The term "Barrel aged" is directly associated with the process of maturation in oak barrels. When a wine is labeled as barrel aged, it indicates that the wine has spent a considerable amount of time in oak containers during fermentation or maturation. This practice can impart additional flavors, aromas, and textures to the wine, such as vanilla, toast, and spice, which are characteristic of oak influence.

Other terms may suggest quality or selection, but they do not explicitly indicate that the wine has undergone oak maturation. "Reserve," for instance, typically describes wines of higher quality but does not specify aging techniques. Similarly, "Grand cuvée" often refers to a blend of high-quality or selected wines, commonly seen in sparkling wines, without necessarily indicating any oak aging. "Vintner's selection" usually denotes a special selection made by the winemaker but doesn't provide any information about the aging process, including the use of oak barrels. Therefore, "Barrel aged" clearly conveys the specific maturation method that is significant in the context of wine production.