a·lu·mi·nous (?-lo?o?m?-n?s)adj. Of, relating to, or containing aluminum or alum.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.aluminous (??lu?m?n?s) adj1. (Chemistry) resembling aluminium2. (Chemistry) another word for aluminiferous aluminosity nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?lu?mi?nous (??lu m? n?s) adj. of the nature of or containing alum or alumina. [1535?45;