Body usually is directly related to alcohol, but think of body as how the wine “rests” on your palate.
Body can give us clues to the type of wine, the region in which was grown, and the possible use of oak aging. Body usually is directly related to alcohol, but think of body as how the wine “rests” on your palate. When you swish it around in your mouth, does it feel like skim, 2%, or whole milk? That texture will roughly correspond with, light, medium, and full bodiedness in wine. Usually body will also correspond with alcohol, but various other processes like lees stirring, malolactic fermentation, oak aging, and residual sugar can all give a wine additional body and texture.