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
third-dimensional adjective

Examples of third dimension in a Sentence

Recent Examples on the Web
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The third dimension of authoritarianism is the stories a regime tells about itself, its people, its history, and its place in the world. Stephen Kotkin, Foreign Affairs, 16 Dec. 2025 Advertisement The third dimension, Environmental Impact, was a core focus of this analysis. Time Staff, Time, 12 Nov. 2025 With it, Pierpaolo explores the space between fabric and body, where the air between them becomes a third dimension and a vital component of their construction to create bold and unexpected shapes. Alex Wynne, Footwear News, 5 Oct. 2025 Plants in containers add that third dimension to our landscape designs. Neil Sperry, Fort Worth Star-Telegram, 8 Aug. 2025 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 13 Jan. 2026.

Last Updated: - Updated example sentences
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