fourth dimension
Americannoun
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Physics, Mathematics. a dimension in addition to length, width, and depth, used so as to be able to employ geometrical language in discussing phenomena that depend on four variables.
Time is considered a fourth dimension for locating points in space-time.
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something beyond the kind of normal human experience that can be explained scientifically.
The story deals with ESP and other excursions into the fourth dimension.
noun
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the dimension of time, which is necessary in addition to three spatial dimensions to specify fully the position and behaviour of a point or particle
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the concept in science fiction of a dimension in addition to three spatial dimensions, used to explain supernatural phenomena, events, etc
Other Word Forms
Etymology
Origin of fourth dimension
First recorded in 1870–75
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, because of the magic of light, the fourth dimension of time is constantly added.
From Seattle Times ● Feb. 2, 2024
As Middleton sees it, the research sets the foundation for using that fourth dimension in data analysis.
From Science Daily ● Oct. 30, 2023
The fourth dimension offers unlimited space in which to unravel even the most complicated knot.
From Washington Post ● May 22, 2020
It takes a story operating in an inexplicable fourth dimension and adds a fifth, which, in a sense, means nothing.
From Los Angeles Times ● Sep. 19, 2018
He could hear it in his head, and like a crack in the fourth dimension, a fracture of the Euclidean plane, Sergio could watch it happening on the television.
From "Nine, Ten: A September 11 Story" by Nora Raleigh Baskin
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
