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ground
noun
the
solid
surface
of
the
earth
that
we
stand
,
walk
,
or
lie
on
•
The
dog
lay
on
the
cool
ground
under
the
tree
.
The
dog
lay
on
the
cool
ground
under
the
tree
.
•
After
the
rain
,
the
ground
was
muddy
and
slippery
.
After
the
rain
,
the
ground
was
muddy
and
slippery
.
Old
English
“
grund
”
meaning
bottom
or
foundation
,
later
broadening
to
the
surface
of
the
earth
.
noun
a
reason
or
cause
for
believing
,
saying
,
or
doing
something
(
often
used
in
the
plural
“
grounds
”)
•
The
judge
found
no
grounds
to
reopen
the
case
.
The
judge
found
no
grounds
to
reopen
the
case
.
•
Maria
had
good
grounds
for
suspicion
when
she
saw
the
broken
lock
.
Maria
had
good
grounds
for
suspicion
when
she
saw
the
broken
lock
.
Extended
from
the
idea
of
something
solid
that
supports
weight
to
something
that
supports
an
argument
or
action
.
noun
a
wire
or
other
connection
that
safely
carries
electricity
into
the
earth
to
prevent
shocks
•
The
electrician
attached
the
green
wire
to
the
ground
.
The
electrician
attached
the
green
wire
to
the
ground
.
•
Without
a
proper
ground
,
the
metal
case
could
become
dangerous
.
Without
a
proper
ground
,
the
metal
case
could
become
dangerous
.
Adopted
in
the
19th-century
telegraph
industry
,
using
the
earth
itself
as
the
return
path
for
electric
current
.
verb
-
ground
,
grounding
,
grounds
,
grounded
to
punish
a
child
or
teenager
by
not
allowing
them
to
go
out
or
enjoy
certain
activities
for
a
period
of
time
•
Mom
grounded
Tim
for
a
week
after
he
broke
the
window
.
Mom
grounded
Tim
for
a
week
after
he
broke
the
window
.
•
If
you
ever
skip
school
again
,
I
will
ground
you
.
If
you
ever
skip
school
again
,
I
will
ground
you
.
First
recorded
in
U
.
S
.
English
in
the
19th
century
,
likening
the
child
to
an
aircraft
kept
on
the
ground
and
not
allowed
to
take
off
.
verb
-
ground
,
grounding
,
grounds
,
grounded
to
stop
an
aircraft
from
flying
,
or
to
stop
something/someone
from
moving
or
operating
•
The
storm
grounded
all
flights
from
the
island
.
The
storm
grounded
all
flights
from
the
island
.
•
Mechanical
problems
can
ground
a
plane
for
hours
.
Mechanical
problems
can
ground
a
plane
for
hours
.
Early
20th-century
aviation
term
:
to
keep
a
plane
on
the
ground
for
safety
or
mechanical
reasons
.
verb
-
ground
,
grounding
,
grounds
,
grounded
to
base
an
opinion
,
idea
,
or
action
firmly
on
something
solid
or
reliable
•
The
teacher
asked
us
to
ground
our
arguments
in
real
evidence
.
The
teacher
asked
us
to
ground
our
arguments
in
real
evidence
.
•
His
novel
is
grounded
in
true
historical
events
.
His
novel
is
grounded
in
true
historical
events
.
Metaphorically
extended
from
something
resting
on
the
physical
ground
to
ideas
resting
on
solid
facts
.
background
noun
the
part
of
a
scene
or
picture
that
is
farthest
from
the
viewer
and
not
the
main
focus
•
Snowy
mountains
rose
in
the
background
of
the
holiday
photo
.
Snowy
mountains
rose
in
the
background
of
the
holiday
photo
.
•
A
small
boat
drifted
past
while
the
city
skyline
shimmered
in
the
background
.
A
small
boat
drifted
past
while
the
city
skyline
shimmered
in
the
background
.
noun
quiet
sound
,
music
,
or
noise
that
is
present
but
not
the
main
focus
•
Soft
jazz
played
in
the
background
while
we
ate
dinner
.
Soft
jazz
played
in
the
background
while
we
ate
dinner
.
•
He
likes
to
keep
the
TV
on
in
the
background
when
he
studies
.
He
likes
to
keep
the
TV
on
in
the
background
when
he
studies
.
noun
a
person
’
s
past
experiences
,
education
,
or
family
that
shapes
who
they
are
•
Despite
her
poor
background
,
Maria
became
a
successful
engineer
.
Despite
her
poor
background
,
Maria
became
a
successful
engineer
.
•
We
want
candidates
with
a
strong
science
background
.
We
want
candidates
with
a
strong
science
background
.
noun
the
general
situation
or
conditions
in
which
something
happens
and
that
helps
explain
it
•
The
speech
came
against
a
background
of
rising
unemployment
.
The
speech
came
against
a
background
of
rising
unemployment
.
•
To
understand
the
conflict
,
you
need
some
historical
background
.
To
understand
the
conflict
,
you
need
some
historical
background
.
noun
computer
programs
or
processes
that
keep
running
while
you
work
on
something
else
and
do
not
appear
on
the
main
screen
•
The
antivirus
program
runs
in
the
background
so
you
never
notice
it
.
The
antivirus
program
runs
in
the
background
so
you
never
notice
it
.
•
Too
many
background
apps
can
drain
your
phone
battery
.
Too
many
background
apps
can
drain
your
phone
battery
.
