Blackboard
Definition of Blackboard
Black´board`
Pronunciation:
blăk´bōrd`
n.
1.
A
broad
board
painted
black
, or any
black
surface
on which
writing
,
drawing
, or the
working
of
mathematical
problems
can be
done
with
chalk
or
crayons
. It is much used in
schools
. In
late
20th
century
similar
boards
of a
green
slate
as well as some
colored
white
became
common
;
wrioting
on the
slate
bioards
may be
done
with
chalk
, but
writing
on the
white
boards
is
done
with
colored
pens
, such as
grease
pens
, which
leaves
a
trace
that can be
easily
erased
. The
newer
boards
,
usualy
called
chalkboards
are
nevertheless
still
sometimes
referred
to as
blackboards
.
Related Words
chalkboard
,
flat
solid
,
sheet
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