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world-line

British

noun

physics a line on a space–time path that shows the path of a body

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

And a distinguished philosopher of science recently derided the attitude that there ought to be a Now on my world-line as “chauvinism of the present moment”.

From Nature

Physicists represent all the events experienced by a single person as a line in four-dimensional space-time, called that person's 'world-line'.

From Nature

There is nothing about any point on my world-line that singles it out as my Now.

From Nature

At any moment I can represent my past experience as my world-line, terminating in my Now.

From Nature

The motion of my Now along my world-line reflects the fact that as my watch advances I acquire more experiences to record.

From Nature

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023