fourth dimension

noun

: a dimension in addition to length, breadth, and depth

specifically : a coordinate in addition to three rectangular coordinates especially when interpreted as the time coordinate in a space-time continuum

: something outside the range of ordinary experience

fourth-dimensional adjective

Examples of fourth dimension in a Sentence

Recent Examples on the Web The Well This is what the fourth dimension looks like Left–Right, Back–Forth, Up–Down. —

Big Think, 24 June 2024 Greene offers up a garden hose as a good example of what the fourth dimension looks like. —

Tim Newcomb, Popular Mechanics, 30 Jan. 2023 This doesn't mean that five connected neurons occupy some mysterious fourth dimension. —

Neuroskeptic, Discover Magazine, 18 July 2017 Newton didn’t believe objects affected space, the American Museum of Natural History writes, but Einstein did, and had even distinguished a fourth dimension known as space-time in his 1905 special theory of relativity. —

USA TODAY, 31 May 2023 See all Example Sentences for fourth dimension

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fourth dimension.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1875, in the meaning defined at sense 1

Time Traveler

The first known use of fourth dimension was in 1875

See more words from the same year

Cite this Entry

Style

“Fourth dimension.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fourth%20dimension. Accessed 27 Jul. 2024.

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