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moderator
noun
a
person
who
controls
the
discussions
within
a
debate
,
meeting
,
or
assembly
to
ensure
orderly
conduct
and
adherence
to
time
limits
.
•
The
moderator
warned
the
speakers
not
to
interrupt
each
other
.
The
moderator
warned
the
speakers
not
to
interrupt
each
other
.
•
Our
teacher
was
the
moderator
at
the
school
debate
club
.
Our
teacher
was
the
moderator
at
the
school
debate
club
.
From
Middle
English
'moderator'
,
borrowed
from
Latin
'moderātor'
(
agent
noun
of
'moderārī'
,
meaning
'to
moderate
,
to
control
,
to
measure'
).
noun
a
person
who
monitors
an
online
discussion
forum
or
social
media
platform
,
removing
inappropriate
content
and
enforcing
rules
.
•
The
forum
moderator
deleted
the
spam
posts
quickly
.
The
forum
moderator
deleted
the
spam
posts
quickly
.
•
She
works
as
a
moderator
on
the
gaming
subreddit
.
She
works
as
a
moderator
on
the
gaming
subreddit
.
From
Middle
English
'moderator'
,
borrowed
from
Latin
'moderātor'
(
agent
noun
of
'moderārī'
,
meaning
'to
moderate
,
to
control
,
to
measure'
).
noun
a
material
,
such
as
graphite
or
heavy
water
,
used
in
a
nuclear
reactor
to
reduce
the
speed
of
neutrons
,
increasing
the
likelihood
of
fission
.
•
Graphite
is
commonly
used
as
a
moderator
in
nuclear
reactors
.
Graphite
is
commonly
used
as
a
moderator
in
nuclear
reactors
.
•
The
moderator
helps
sustain
the
chain
reaction
.
The
moderator
helps
sustain
the
chain
reaction
.
From
Middle
English
'moderator'
,
borrowed
from
Latin
'moderātor'
(
agent
noun
of
'moderārī'
,
meaning
'to
moderate
,
to
control
,
to
measure'
).
The
nuclear
sense
derives
from
the
verb
sense
of
slowing
or
controlling
.