Definitions of zero

adjust (
as
by
firing
under
test
conditions)
the
zero
of (
a
gun); "
He
zeroed
in
his
rifle
at
200
yards"

a
mathematical
element
that
when
added
to
another
number
yields
the
same
number

the
quantity
that
registers
a
reading
of
zero
on
a
scale

adjust (
an
instrument
or
device)
to
zero
value

A
cipher;
nothing;
naught.

The
point
from
which
the
graduation
of
a
scale,
as
of
a
thermometer,
commences.

Fig.:
The
lowest
point;
the
point
of
exhaustion;
as,
his
patience
had
nearly
reached
zero.

A
cipher;
nothing;
neutral
point
on
a
scale,
of
temperature,
etc.,
from
which
reckoning
begins:
zero
hour,
the
hour
fixed
for
beginning
a
military
engagement,
as
an
advance,
or
attack.

Cipher:
nothing:
the
point
from
which
a
thermometer
is
graduated.

The
cipher
0 :
nothing;
point
from
which
a
thermometer, &
c.,
is
graduated.

The
numeral
0;
a
cipher.

The
absence
of
quantity;
nothing.

The
lowest
point,
as
on
the
scale
of
a
thermometer.

A
cipher;
nothing;
the
point
of
a
thermometer
from
which
it
is
graduated,
being
in
Reaumur's
and
the
centigrade
thermometers,
at
the
freezing
point
of
water;
in
Fahrenheit's
thermometer,
at
32

The
neutral
point
between
any
ascending
and
descending
scale
or
series,
generally
represented
by
the
mark
o;
the
extreme
point
of
depression;
naught;
nothing;
the
point
of
a
graduated
instr.
at
which
its
scale
commences.

The
origin
of
graduation.

indicating
an
initial
point
or
origin

having
no
measurable
or
otherwise
determinable
value; "
the
goal
is
zero
population
growth"
X