wavelength
noun
wave·length
ˈwāv-ˌleŋ(k)th 
1
: the distance in the line of advance of a wave from any one point to the next point of corresponding phase
2
: a particular course or line of thought especially as related to mutual understanding
two people on different wavelengths
Examples of wavelength in a Sentence
Light and sound have different wavelengths.
Recent Examples on the Web
Its Anti-Acne LED Pen is an under-$100 gadget that emits blue and red wavelengths to kill acne-causing bacteria, diminish oil production, and rejuvenate skin on the whole.
—
Stacia Datskovska, Footwear News, 26 Dec. 2025
Most traditional systems respond mainly to shorter visible wavelengths.
—Sujita Sinha, Interesting Engineering, 26 Dec. 2025
An infrared monster Light comes in multiple wavelengths, which astronomers often use to reveal different characteristics about the same objects.
—Robert Lea, Space.com, 19 Dec. 2025
Space telescopes are typically optimized either to study a small patch of the sky across many wavelengths of light or to survey vaster swaths of the cosmos in only a handful of wavelengths.
—Meghan Bartels, Scientific American, 19 Dec. 2025
See All Example Sentences for wavelength
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Stacia Datskovska, Footwear News, 26 Dec. 2025
Most traditional systems respond mainly to shorter visible wavelengths.
—Sujita Sinha, Interesting Engineering, 26 Dec. 2025
An infrared monster Light comes in multiple wavelengths, which astronomers often use to reveal different characteristics about the same objects.
—Robert Lea, Space.com, 19 Dec. 2025
Space telescopes are typically optimized either to study a small patch of the sky across many wavelengths of light or to survey vaster swaths of the cosmos in only a handful of wavelengths.
—Meghan Bartels, Scientific American, 19 Dec. 2025
See All Example Sentences for wavelength
Cite this Entry
“Wavelength.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wavelength. Accessed 31 Dec. 2025.
Copy CitationKids Definition
wavelength
noun
wave·length
ˈwāv-ˌleŋ(k)th
1
: the distance (as from crest to crest) in the line of advance of a wave from any one point to the next corresponding point
2
: a certain line of thought or behavior that reveals a common understanding
coworkers who are on the same wavelength
Medical Definition
wavelength
noun
wave·length
-ˌleŋ(k)th
: the distance in the line of advance of a wave from any one point to the next point of corresponding phase
—symbol λ
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