blackboard
nounUK /ˈblæk.bɔːd/
US /ˈblæk.bɔːrd/
A blackboard is a dark board that teachers write on with chalk.
The teacher wrote our spelling words on the blackboard.
OTHER MEANINGS
2. A large board used for displaying notices or scores in public places.
The final scores were posted on the blackboard outside the gym.
3. A dark surface used in sports, such as for keeping score or drawing plays.
The coach drew the next play on the blackboard.
4. A computer-based shared workspace where users can post messages and files.
Students shared their notes on the online blackboard.