Definition of "wavelength" []

• The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest. (noun)
• On the same wavelength Informal In complete accord; in harmony: "a fluid ... production in which author, director, designer and cast seem to be working on the same wavelength” ( James Lardner). (idiom)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "He was on a wavelength with her, in a way that most human beings aren't on a ­wavelength with animals. ""
• "Right now the cloak operates for light between 1,400 and 1,800 nanometers in wavelength, which is the near-infrared portion of the electromagnetic spectrum, just slightly longer than light that can be seen with the human eye."
• "This extremely simple relationship can be considered as the completely adequate expression of Wien's energy distribution law; for with the dependence upon the energy, the dependence upon the wavelength is always directly given through the general, well-established displacement law by Wien."