noun
wavelength
WAYV-lehngth
noun
1
The physical distance between two matching points of a wave, such as crest to crest.
"Radio waves have a much longer wavelength than visible light."
2
Informally, someone's general way of thinking, especially in the phrase "on the same wavelength."
"They clicked instantly — completely on the same wavelength."
How to Use Wavelength
Learner’s notesIn plain EnglishThe distance measure of a wave in physics, or figuratively, being in sync with how someone thinks.
Common pairings
on the same wavelength
radio wavelength
Word Forms
wavelengths plural
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Radio waves have a much longer _____ than visible light.
Etymology
A straightforward compound of "wave" and "length," coined for physics and later extended figuratively to describe how well two people's thinking aligns.