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group
noun
a
number
of
people
or
things
that
are
together
or
share
a
characteristic
•
A
group
of
children
played
soccer
in
the
park
.
A
group
of
children
played
soccer
in
the
park
.
•
The
tour
group
waited
outside
the
museum
entrance
.
The
tour
group
waited
outside
the
museum
entrance
.
Borrowed
into
Middle
English
from
French
groupe
,
ultimately
from
Italian
gruppo
,
meaning
a
knot
or
cluster
.
verb
-
group
,
grouping
,
groups
,
grouped
to
put
people
or
things
together
based
on
shared
features
•
Please
group
the
files
by
month
before
you
send
them
.
Please
group
the
files
by
month
before
you
send
them
.
•
The
teacher
grouped
the
students
according
to
their
interests
.
The
teacher
grouped
the
students
according
to
their
interests
.
Developed
from
the
noun
sense
in
the
17th
century
,
shifting
from
the
idea
of
a
cluster
to
the
action
of
forming
one
.
noun
a
vertical
column
in
the
periodic
table
containing
elements
with
similar
outer-electron
configurations
•
Sodium
is
in
Group
1
of
the
periodic
table
.
Sodium
is
in
Group
1
of
the
periodic
table
.
•
Elements
in
the
same
group
often
have
similar
chemical
properties
.
Elements
in
the
same
group
often
have
similar
chemical
properties
.
The
chemical
sense
arose
in
the
late
19th
century
as
scientists
organized
the
periodic
table
into
columns
called
groups
.
noun
in
mathematics
,
a
set
with
an
operation
that
combines
any
two
elements
to
produce
a
third
element
,
following
the
rules
of
closure
,
associativity
,
identity
,
and
inverse
•
In
algebra
,
the
integers
under
addition
form
a
group
.
In
algebra
,
the
integers
under
addition
form
a
group
.
•
He
spent
hours
proving
that
the
set
is
not
a
group
.
He
spent
hours
proving
that
the
set
is
not
a
group
.
Adopted
into
mathematical
terminology
in
the
early
19th
century
by
French
mathematician
Évariste
Galois
.
