middle classn. The socioeconomic class between the working class and the upper class, usually including professionals, highly skilled laborers, and lower and middle management.mid?dle-class? adj.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.middle class n (Sociology) Also called: bourgeoisie a social stratum that is not clearly defined but is positioned between the lower and upper classes. It consists of businesspeople, professional people, etc, along with their families, and is marked by bourgeois values. Compare lower class, upper class, working class adj (Sociology) of, relating to, or characteristic of the middle class Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014mid?dle class? n. 1. a class of people intermediate between those of higher and lower economic or social standing, generally characterized by average income and education, conventional values, and conservative attitudes. 2. the class traditionally intermediate between the aristocracy and the working class. [1760?70] mid?dle-class?, adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.middle classThe class of people in a society who are above the working class but below the upper class, typically composed of professionals and managers.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited