Dictionary.com
Thesaurus.com

worldline

American  
Physics.
  1. (in relativity) the path of a particle in space-time.


Etymology

Origin of worldline

First recorded in 1915–20

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A worldline is the record of every event that occurs throughout one's life.

From Science Daily Nov. 2, 2025

The car's position is a point within each instant, and those points join to form a worldline -- the full record of the car's position throughout the time interval, whose slope is the car's speed.

From Science Daily Nov. 2, 2025

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training