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Fourier transform

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noun Mathematics.
  1. a mapping of a function, as a signal, that is defined in one domain, as space or time, into another domain, as wavelength or frequency, where the function is represented in terms of sines and cosines.

Origin of Fourier transform

First recorded in 1920–25; see origin at Fourier analysis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fourier transform

Fourier transform

noun
  1. an integral transform, used in many branches of science, of the form F(x) = [1/√(2π)]ʃe i xy f(y)d y, where the limits of integration are from –∞ to +∞ and the function F is the transform of the function f
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012