Tex-Mex (t?ks?m?ks?)adj. Of or characterized by a blend of Mexican and southwest US cultural elements: Tex-Mex music; Tex-Mex food.[Tex(as) + Mex(ican).]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.Tex-Mex (?t?ks?m?ks) adj (Cookery) of, relating to, or denoting the Texan version of something Mexican, such as music, food, or languageCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Tex-Mex (?t?ks?m?ks) adj. of or denoting aspects of Texan or southwestern U.S. culture originating with or influenced by Mexicans or Mexican-Americans: Tex-Mex cooking. [1945?50] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.