Definition of blackboard:
(n) :
a large flat surface, finished with black slate or a similar material, that can be written upon with
chalk and subsequently erased; a
chalkboard
(v) :
to use a blackboard to assist in an informal discussion
Definition of blackboard:
(n) :
a large flat surface, finished with black slate or a similar material, that can be written upon with
chalk and subsequently erased; a
chalkboard
(v) :
to use a blackboard to assist in an informal discussion