Last Updated：2025/11/20
(uncountable, physics) The four-dimensional continuum of the three spatial dimensions plus time.
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spacetime
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Source Word
spacetime
Noun
uncountable
countable
Japanese Meaning
空間と時間を合わせた四次元の連続体、すなわち物理学における空間と時間が一体となった概念
Sense（1）
Sense（2）
(physics)
An
n-dimensional
continuum
consisting
of
dimensions
of
both
space
and
time.
Normally
spacetime
is
considered
as
having
4
dimensions
(x,
y,
z,
t),
but
higher-dimensional
spacetimes
are
often
encountered
in
theoretical
physics,
e.g.
the
5-dimensional
spacetime
of
Kaluza-Klein
theory
or
the
11
dimensions
of
spacetime
in
M-theory.
（ plural ）
