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

is that

**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 while

**achronal** is (physics) describing a set of points in a spacetime, no two of which have timelike separation.

## As adjectives the difference between **timelike** and **achronal**

is that

**timelike** is (mathematics|physics) of a four-vector in representing a point in spacetime, having a positive four-vector norm while

**achronal** is (physics) describing a set of points in a spacetime, no two of which have timelike separation.