“Reserve” is a term without an official meaning in the American wine industry. It can be used by anyone on any wine. Some wineries only have a “Reserve” line — which means it’s more about marketing than anything else. They’d never admit it, but I’m convinced that some producers even put “Reserve” on a bottle just so they can charge more for it. For a while, here on Long Island, “Reserve” has meant bigger, riper and oakier. Sometimes wineries boast about long a “Reserve” wine is aged in oak barrels on the back label — as if that’s a sign…