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

This is possible because elements absorb light at different characteristic wavelengths. —Robert Lea, Space.com, 6 Feb. 2025

Some couples, like Contessa and Scott, and Jackie and Curtis, share similar answers, while others—like Sweet Tea and Gregory—are clearly on different wavelengths. —Shelby Stewart, Essence, 3 Feb. 2025

Developing eyes may benefit from natural light at different wavelengths, looking at long distances and appreciating horizons. —Adrianna Rodriguez, USA TODAY, 1 Feb. 2025

The transition, which emits a bit of electromagnetic radiation at a wavelength of 21 centimeters, doesn’t happen often. —The Editors, JSTOR Daily, 30 Jan. 2025

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