blackboard UK /ˈblækbɔːd/US /ˈblækbɔɹd/noun 1verb 1forms 3 noun1 •A large flat surface, finished with black slate or a similar material, that can be written upon with chalk and subsequently erased; a chalkboard. verb1 •To use a blackboard to assist in an informal discussion. formsblackboarded · blackboarding · blackboards
