To write or draw with chalk. The teacher chalked the math problem on the blackboard.
To mark or outline with chalk. The referee chalked the lines on the field before the game started.
To record or score something, often used in the context of sports or games. He chalked up another victory for his team.
To attribute or ascribe something to a particular cause. She chalked her success up to hard work and determination.
To deteriorate so that a painted or coated surface turns powdery and chalk-like. After a few years of harsh sunlight, the exterior paint began to chalk.