ferment definition

1. a substance capable of bringing about fermentation
2. be in an agitated or excited state
• examples: The Middle East is fermenting
• examples: Her mind ferments
3. work up into agitation or excitement
• examples: Islam is fermenting Africa
4. cause to undergo fermentation
• examples: We ferment the grapes for a very long time to achieve high alcohol content
• examples: The vintner worked the wine in big oak vats