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expression
noun
a
word
or
group
of
words
that
has
a
particular
meaning
•
I
didn't
understand
the
expression
'{{{
class='hover
:
underline
'
href='/dictionary/search/hit
the
hit'>sack'>hit
the
sack
}}}'
until
I
looked
it
up
.
I
didn't
understand
the
expression
'{{{
class='hover
:
underline
'
href='/dictionary/search/hit
the
hit'>sack'>hit
the
sack
}}}'
until
I
looked
it
up
.
•
Please
avoid
slang
expressions
in
your
essay
.
Please
avoid
slang
expressions
in
your
essay
.
noun
the
act
of
showing
what
you
think
or
feel
through
words
,
art
,
or
actions
•
Painting
is
his
favorite
form
of
self-expression
.
Painting
is
his
favorite
form
of
self-expression
.
•
Her
smile
was
an
expression
of
gratitude
.
Her
smile
was
an
expression
of
gratitude
.
noun
the
look
on
someone
’
s
face
that
shows
what
they
are
thinking
or
feeling
•
Her
puzzled
expression
made
me
laugh
.
Her
puzzled
expression
made
me
laugh
.
•
With
a
stern
expression
,
the
coach
called
the
team
together
.
With
a
stern
expression
,
the
coach
called
the
team
together
.
noun
a
combination
of
numbers
,
symbols
,
or
words
that
represents
a
value
or
calculation
in
mathematics
or
computing
•
Solve
the
algebraic
expression
2x
+
5
.
Solve
the
algebraic
expression
2x
+
5
.
•
In
JavaScript
,
an
expression
can
return
a
value
.
In
JavaScript
,
an
expression
can
return
a
value
.
noun
the
process
by
which
information
from
a
gene
is
used
to
create
a
protein
or
trait
in
a
living
organism
•
Scientists
studied
gene expression
in
cancer
cells
.
Scientists
studied
gene expression
in
cancer
cells
.
•
Proper
nutrition
can
affect
the
expression
of
certain
genes
.
Proper
nutrition
can
affect
the
expression
of
certain
genes
.
noun
the
act
of
squeezing
or
pressing
something
to
force
out
liquid
such
as
juice
or
oil
•
The
chef
used
a
press
for
the
expression
of
lemon
juice
.
The
chef
used
a
press
for
the
expression
of
lemon
juice
.
•
Olive
expression
produces
high-quality
oil
.
Olive
expression
produces
high-quality
oil
.