What does VOS stand for in sherry terminology?

In sherry terminology, VOS stands for "Vinum Optimum Signatum," which translates to "Optimum Selected Wine." This designation is used specifically for sherries that have been aged for over 20 years in the solera system. The VOS designation indicates a commitment to quality and aging, reflecting the complexity and depth of flavor that such a long maturation period can produce. Wines labeled as VOS typically display rich, concentrated flavors along with a profound aromatic profile, which are hallmarks of their extended aging process.

The other choices refer to different concepts or designations that do not accurately reflect the meaning of VOS. The term itself is tightly defined and reserved for wines that meet the stringent aging qualifications, distinguishing it from younger sherries or other categories entirely.