Last Updated：2025/11/20
(mathematics) the symbol ±, meaning plus or minus
, used to indicate the precision of an approximation (as in The result is 10 ± 0.3
, meaning the result is anywhere in the inclusive range from 9.7 to 10.3), or as a convenient shorthand for a quantity with two possible values of opposing sign and identical magnitude (as in The roots of the equation x² - 4 = 0 are ±2
).
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plus-minus sign
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Source Word
plus-minus sign
Noun
(mathematics)
the
symbol
±,
meaning
"plus
or
minus",
used
to
indicate
the
precision
of
an
approximation
(as
in
"The
result
is
10
±
0.3",
meaning
the
result
is
anywhere
in
the
inclusive
range
from
9.7
to
10.3),
or
as
a
convenient
shorthand
for
a
quantity
with
two
possible
values
of
opposing
sign
and
identical
magnitude
(as
in
"The
roots
of
the
equation
x²
-
4
=
0
are
±2").
Japanese Meaning
数学において、±記号（プラスマイナス記号）を指し、数値がある基準値±の範囲内にあることを示す記号。 / ある値がプラスの値とマイナスの値の両方の可能性を持つこと、または正と負の両方向を示すために使われる記号。
Sense（1）
(mathematics)
the
symbol
±,
meaning
"plus
or
minus",
used
to
indicate
the
precision
of
an
approximation
(as
in
"The
result
is
10
±
0.3",
meaning
the
result
is
anywhere
in
the
inclusive
range
from
9.7
to
10.3),
or
as
a
convenient
shorthand
for
a
quantity
with
two
possible
values
of
opposing
sign
and
identical
magnitude
(as
in
"The
roots
of
the
equation
x²
-
4
=
0
are
±2").
（ plural ）
