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

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

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

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 22 Nov. 2024.

Copy Citation