1. a dark smooth surface, usually green or black, on which you can write or draw with chalk

Examples

• The teacher wrote the math problem on the chalkboard.
• Students copied the notes from the chalkboard into their notebooks.
• The old classroom had a large green chalkboard at the front.
• She erased the chalkboard before writing the new lesson.
• The principal announced that all chalkboards would be replaced with whiteboards.
• Chalk dust covered the bottom of the chalkboard after the long lesson.