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English definition of “blackboard”

blackboard

noun [C]     /ˈblæk.bɔːd/ US  /-bɔːrd/
A2 a dark surface on a wall or frame that a teacher writes on with chalk (= white substance)Paper Schools in generalPaper
(Definition of blackboard noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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