noun Download 🔗Share The addition of sugar to grape juice in the fermentation of wine. Usually done if the grapes are thought to lack enough natural sugars for the desired alcohol content. Examples : "Because the grapes had a lower sugar content than usual due to a cold, wet summer, the winemaker decided to use chaptalisation to achieve the desired alcohol level in the wine. " food drink agriculture chemistry process Chat with AIVocabulary GamePractice Reading