Wine, derived most commonly from various forms of grape is one of the less common flavour notes in the world of eliquid. When it does appear it’s often in sweet, fruity form and is likely to be used to compliment a more dominant flavour note.
Given the sheer variety of wine flavours it’s hard to say just how accurate eliquids that employ wine as a flavour note are. Some specify red or white, some refer to ‘rich wine’ for example leaving it somewhat vague. Likely to work best in a higher PG liquid, with an emphasis on mouth to lung vaping due to it’s bold flavour even when used as a complimentary flavour.