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

There’s a certain wavelength of hangdog humor that denizens of the former Soviet Republics seem able to tune into at will, and Georgian director Levan Koguashvili more than most. — Jessica Kiang, Variety, 16 Sep. 2026

The researchers produced six different compositions and gradually shifted their optical properties toward wavelengths commonly available from indoor lighting. — Kaif Shaikh, Interesting Engineering, 16 Sep. 2026

Following the successful activation of its infrared sensors, engineers moved on to calibrate the WFI's element wheel, which filters individual wavelengths for detection using a system of prisms and other optic mechanisms. — Josh Dinner, Space.com, 16 Sep. 2026

Compared with commercial devices, this treatment produces a much stronger effect in terms of power, pulse frequency, penetration and wavelength, Utah’s researchers say. — Mirin Fader, New York Times, 11 Sep. 2026

Word History

First Known Use

1850, in the meaning defined at sense 1

Kids 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