waveguide

noun

wave·​guide ˈwāv-ˌgīd How to pronounce waveguide (audio)
: a device (such as a duct, coaxial cable, or glass fiber) designed to confine and direct the propagation of electromagnetic waves (such as light)
especially : a metal tube for channeling ultrahigh-frequency waves

Examples of waveguide in a Sentence

Recent Examples on the Web
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But most photonic systems keep light confined within tiny optical waveguides on the chip. Aamir Khollam, Interesting Engineering, 12 Mar. 2026 As for the waveguide, it’s made of a dielectric at the center, which channels the terahertz signal, surrounded by cladding. IEEE Spectrum, 27 Dec. 2025 The Rokid Glasses use a green binocular display that projects a 640-by-480 picture through the waveguides, centered in your view. PC Magazine, 17 Oct. 2025 The smart glasses feature dual green micro-LED waveguide displays (up to 1500 nits), powered by Qualcomm’s Snapdragon AR1 and NXP’s RT600 chips, all in an impressively lightweight 49g form factor. Charlie Fink, Forbes.com, 5 Sep. 2025 See All Example Sentences for waveguide

Word History

First Known Use

1932, in the meaning defined above

Time Traveler
The first known use of waveguide was in 1932

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Cite this Entry

“Waveguide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waveguide. Accessed 13 Mar. 2026.

Medical Definition

waveguide

noun
wave·​guide ˈwāv-ˌgīd How to pronounce waveguide (audio)
: a device (as a glass fiber) designed to confine and direct the propagation of electromagnetic waves (as light)
use of waveguides for visual examination of the stomach

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