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principal
noun
the
person
in
charge
of
a
school
•
The
principal
greeted
the
students
at
the
front
gate
every
morning
.
The
principal
greeted
the
students
at
the
front
gate
every
morning
.
•
After
winning
the
science
fair
,
Mia
was
called
to
the
principal's
office
for
praise
.
After
winning
the
science
fair
,
Mia
was
called
to
the
principal's
office
for
praise
.
Sense
first
recorded
in
the
15th
century
for
heads
of
colleges
;
later
applied
to
schools
.
noun
the
original
amount
of
money
that
is
lent
or
invested
,
not
including
interest
•
You
pay
interest
on
the
loan
as
well
as
the
principal
.
You
pay
interest
on
the
loan
as
well
as
the
principal
.
•
She
invested
$10
,
000
as
the
principal
and
earned
interest
each
year
.
She
invested
$10
,
000
as
the
principal
and
earned
interest
each
year
.
Applied
in
finance
since
the
19th
century
to
mean
the
chief
sum
of
money
.
noun
a
leading
performer
in
a
play
,
opera
,
or
ballet
•
She
was
promoted
to
principal
dancer
after
just
three
seasons
.
She
was
promoted
to
principal
dancer
after
just
three
seasons
.
•
The
principal
sang
the
opening
aria
flawlessly
.
The
principal
sang
the
opening
aria
flawlessly
.
Sense
arose
in
the
17th
century
for
leading
actors
in
theatre
companies
.
pal
noun
a
close
friend
or
buddy
•
After
moving
to
the
new
school
,
Liam
soon
found
a
pal
to
sit
with
at
lunch
.
After
moving
to
the
new
school
,
Liam
soon
found
a
pal
to
sit
with
at
lunch
.
•
My
grandpa
says
he
still
writes
letters
to
his
old
army
pal
every
year
.
My
grandpa
says
he
still
writes
letters
to
his
old
army
pal
every
year
.
Late
17th-century
originally
in
thieves
’
slang
,
from
Romani
‘
phal
’
meaning
‘
brother
’.
verb
-
pal
,
palling
,
pals
,
palled
to
spend
time
as
friends
;
to
associate
closely
•
During
summer
camp
,
the
two
boys
quickly
palled
and
were
never
seen
apart
.
During
summer
camp
,
the
two
boys
quickly
palled
and
were
never
seen
apart
.
•
Emma
loves
to
pal
with
classmates
who
share
her
interest
in
robotics
.
Emma
loves
to
pal
with
classmates
who
share
her
interest
in
robotics
.
Derived
from
the
noun
“
pal
”
in
the
late
19th-century
,
turning
the
idea
of
a
friend
into
an
action
of
friendly
association
.
PAL
noun
a
television
color
broadcasting
system
used
in
many
countries
outside
North
America
•
Most
European
DVDs
are
encoded
in
the
PAL
video
format
.
Most
European
DVDs
are
encoded
in
the
PAL
video
format
.
•
Older
game
consoles
sold
in
Australia
output
only
PAL
signals
.
Older
game
consoles
sold
in
Australia
output
only
PAL
signals
.
1960s
:
acronym
of
Phase
Alternating
Line
,
referring
to
the
way
the
color
signal
is
encoded
.