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concentration
noun
the
ability
to
give
all
your
attention
to
one
thought
,
activity
,
or
object
without
being
distracted
•
The
library
was
so
quiet
that
Anna
’
s
concentration
stayed
strong
for
hours
.
The
library
was
so
quiet
that
Anna
’
s
concentration
stayed
strong
for
hours
.
•
Playing
chess
requires
intense
concentration
on
every
possible
move
.
Playing
chess
requires
intense
concentration
on
every
possible
move
.
from
Latin
‘
concentrare
’
meaning
‘
to
bring
to
the
centre
’,
later
used
figuratively
for
mental
focus
noun
the
amount
of
a
substance
present
in
a
mixture
or
solution
compared
with
the
total
amount
of
the
mixture
or
solution
•
A
high
salt
concentration
makes
seawater
unsafe
to
drink
.
A
high
salt
concentration
makes
seawater
unsafe
to
drink
.
•
The
scientist
measured
the
glucose
concentration
in
each
blood
sample
.
The
scientist
measured
the
glucose
concentration
in
each
blood
sample
.
extended
scientific
use
from
sense
of
‘
bringing
substances
together
’
in
the
19th
century
noun
a
large
number
or
amount
of
people
or
things
gathered
in
one
place
•
There
is
a
heavy
concentration
of
restaurants
in
the
city
center
.
There
is
a
heavy
concentration
of
restaurants
in
the
city
center
.
•
The
hurricane
brought
a
dangerous
concentration
of
debris
to
the
shoreline
.
The
hurricane
brought
a
dangerous
concentration
of
debris
to
the
shoreline
.
sense
of
‘
gathering
together
’
appeared
in
English
in
the
17th
century
noun
the
act
of
making
a
liquid
or
substance
stronger
by
removing
water
or
other
diluting
material
•
Fruit
juice
undergoes
concentration
before
it
is
shipped
and
later
diluted
.
Fruit
juice
undergoes
concentration
before
it
is
shipped
and
later
diluted
.
•
Desalination
plants
use
evaporation
for
the
concentration
of
brine
.
Desalination
plants
use
evaporation
for
the
concentration
of
brine
.
derived
from
earlier
sense
of
‘
bringing
together
’
applied
to
liquids
in
the
mid-19th
century
