# Spacetime vs Timelike - What's the difference?

spacetime | timelike |

## In context|physics|lang=en terms the difference between spacetime and timelike

is that spacetime is (physics) an n''-dimensional continuum consisting of dimensions of both space & time normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, eg the 5-dimensional spacetime of kaluza-klein theory or the 11 dimensions of spacetime in m-theory while timelike is (physics) (of the interval between two events in spacetime ) having overlapping light cones, so that information can pass from one to the other, and one can be envisaged as a cause of the other.

## As a noun spacetime

is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time.

## As an adjective timelike is

(mathematics|physics) of a four-vector in representing a point in spacetime, having a positive four-vector norm.

# spacetime

## English

(wikipedia spacetime)

### Noun

• (uncountable, 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.
• (physics) An n''-dimensional continuum consisting of dimensions of both space & 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.
• (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-NordstrÃ¶m spacetime," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," etc.

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* time-like