plural of blackboard

Third-person singular simple present indicative form of blackboard

A large flat surface, finished with black slate or a similar material, that can be written upon with chalk and subsequently erased; a chalkboard.

To use a blackboard to assist in an informal discussion.

simple past tense and past participle of blackboard

present participle of blackboard

A typeface used for representing bold characters, mainly used in mathematical texts, that allows these characters to be easily distinguished from non-bold characters when written.