1. undergoing fermentation; breaking down chemically through the action of bacteria, yeast, or other microorganisms
2. causing or promoting fermentation

1. in the process of fermentation; undergoing chemical breakdown

Examples

• The grapes are fermenting in large wooden barrels.
• She could smell the fermenting cabbage from the kitchen.
• The fermenting yeast produces alcohol and carbon dioxide.
• Fermenting fruit attracts many insects.
• The fermenting process takes several weeks to complete.
• They use fermenting agents to make the bread rise.
• The fermenting mixture bubbled vigorously in the jar.