1. A form of live entertainment characterized by improvisation and interaction with the audience
   - impro 
2. (informal) improvisation
   - impro

Encyclopedia: Improv

• coffer
• cofferdam
• Coffey still
• coffin
• coffin nail
• coffle
• cofounder
• cog
• cog railway
• cogency
• cogeneration
• cogent
• cogent evidence
• cogently
• cogged
• byrnie
• byroad
• Byron
• Byronic
• byssus
• bystander
• byte
• byway
• byword
• byzant