# spacetime

> English word · Noun · IPA /ˈspeɪsˌtaɪm/ · frequency rank #35,948

## Definitions
1. The four-dimensional continuum of the three spatial dimensions plus time.
2. 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.
3. A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.

## Etymology
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.

## Common misspellings (13)
`psacetime`, `sapcetime`, `spaccetime`, `spaceitme`, `spacetiem`, `spacetimme`, `spacetmie`, `spacettime`, `spacteime`, `spaectime`, `spcaetime`, `sppacetime`, `sspacetime`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/spacetime