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An effect whereby the perception of positive qualities in one thing or part gives rise to the perception of similar qualities in related things or in the whole: "Congenial surroundings or service at a restaurant can sometimes create a halo effect for the food" (M.H. Reed).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Psychology) See horns and halo effect
2. (Commerce) the beneficial effect on sales of a company's range of products produced by the popularity or high profile of one particular product
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a potential inaccuracy in estimation or judgment, esp. of a person, due to a tendency to overgeneralize from a single salient feature or action, usu. in a favorable direction.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.