A2
a piece of wood, plastic, etc. on a wall where information can be put
Dictionary examples:
The teacher's pet put a 'Best Teacher' note on the board. (0.0)
The office board said 'No napping', but Tom was already snoring. (0.0)
The classroom board said 'Pop quiz today!'. Half the class disappeared. (0.0)
I stuck the notice up on the board. (23.4)