- (in relativity) the path of a particle in space-time.
Origin of worldline
First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for world-line
The time dimension and the world-line, he said sharply, excited in spite of himself.
Revolving in the time dimension means telescoping in the world-line.
- physics a line on a space–time path that shows the path of a body