spacetime.
The four-dimensional continuum of the three spatial dimensions plus time.
Meaning & usage
The four-dimensional continuum of the three spatial dimensions plus time.
An event is a point in spacetime, specified by the coordinates x, y, z, and t.
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.
a Minkowski spacetime
a 5-dimensional spacetime
A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.
a Schwarzschild spacetime
a Reissner-Nordström spacetime
Where this word comes from
From space + time, as a calque of German Raumzeit, introduced in this sense by Hermann Minkowski. First appears in print c. 1893 in the Philosophical Review.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.