교실 등에서 분필로 글씨를 쓰거나 그림을 그리는 데 사용하는, 보통 검은색이나 초록색의 큰 판.
A large board with a smooth, typically dark surface used for writing on with chalk, especially in a classroom.
예문:
"The teacher wrote the math equations clearly on the blackboard."
"Student volunteers were asked to come forward and draw a map on the blackboard."
"After the lecture, the janitor wiped the dusty blackboard clean."