| spacetime | |
| 1. n. (physics) 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. | |
| 2. n. (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 | |
| 3. n. (relativity) 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," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," | |
