1. a soft white limestone substance used for writing on blackboards
2. a piece of this substance shaped into a stick for writing or drawing

1. to write, draw, or mark with chalk
2. to rub chalk on something, especially for grip

Examples

• The teacher wrote the equation on the board with white chalk.
• She picked up a piece of chalk to solve the math problem.
• The cliffs were made of pure chalk and gleamed in the sunlight.
• He chalked his hands before attempting the difficult climb.
• The gymnast chalked the parallel bars for better grip.
• She chalked her name on the sidewalk.
• The pool player chalked his cue stick between shots.