1. A challenge to defend what someone has said
   - demand for explanation

Type of: challenge

• ball nettle
• ball nightshade
• ball of fire
• ball over
• ball valve
• ball-and-socket joint
• ball-breaker
• ball-buster
• ball-hawking
• ball-peen hammer
• ball-shaped
• ballad
• ballad maker
• ballade
• balladeer
• balladry
• ballast
• ballast resistor
• ballcock
• balldress
• ballerina
• ballet
• ballet company
• ballet dancer
• ballet master