Definition of blackboard in English:

blackboard

Syllabification: black·board
Pronunciation: /ˈblakbôrd
 
/

noun

A large board with a smooth, typically dark, surface attached to a wall or supported on an easel and used for writing on with chalk, especially by teachers in schools.
More example sentences
  • The walls were covered in blackboards with chalk markings that seemed to be in a language of numbers.
  • Although the Government has approved a €15 million project to provide broadband internet access in all schools, teachers said this was like providing chalk without blackboards.
  • We will ensure that the backdrops in your scenes - the writing on the blackboards, the equipment in the labs - look realistic; that your universities look like universities and your academics act like academics.

Definition of blackboard in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict