third dimension

noun

1
: thickness, depth
also : a dimension that adds the effect of solidity to a two-dimensional system
2
: a quality that confers reality or lifelikeness
… night sounds that stick in the mind and give a third dimension to the memory.—Adie Suehsdorf

Examples of third dimension in a Sentence

Recent Examples on the Web
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Why giving light a third dimension matters The technique could eventually be useful far beyond individual atoms. — Rupendra Brahambhatt, Interesting Engineering, 3 Oct. 2026 This is the third dimension, and almost no one knows to ask about it. — Meredith Moore, Forbes.com, 18 Sep. 2026 After the third dimension, researchers have found them only for dimensions 8 and 24. — Jack Murtagh, Scientific American, 17 Sep. 2026 The third dimension, Stock Performance, was evaluated based on multiple KPIs, that underline the companies’ strengths as a stock investment. — Time Staff, Time, 28 May 2026 See All Example Sentences for third dimension

Word History

First Known Use

1846, in the meaning defined at sense 1

Time Traveler
The first known use of third dimension was in 1846

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Cite this Entry

“Third dimension.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third%20dimension. Accessed 4 Oct. 2026.

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