blackboard

== English == === Etymology === From black +‎ board, because such surfaces were once typically made of black slate. === Pronunciation === (General American) IPA(key): /ˈblækbɔɹd/, /ˈblækboɹd/ (Received Pronunciation) IPA(key): /ˈblækbɔːd/ Rhymes: -ækbɔː(ɹ)d, -ækboɹd Hyphenation: black‧board === Noun === blackboard (plural blackboards) A large flat surface, finished with black slate or a similar material, that can be written upon with chalk and subsequently erased; a chalkboard. ==== Hypernyms ==== writing board ==== Derived terms ==== blackboard bold blackboard jungle ==== Related terms ==== chalkboard greenboard whiteboard ==== Translations ==== === Verb === blackboard (third-person singular simple present blackboards, present participle blackboarding, simple past and past participle blackboarded) To use a blackboard to assist in an informal discussion.