pink noise n (Electronics) noise containing a mixture of frequencies, but excluding higher frequencies Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pink noise – Random white noise that has been adjusted so there is equal energy per octave and an equal amount of each signal can be heard.See also related terms for heard.Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.