Oc·cam (?k??m), William of See William of Ockham.Ock·ham also Oc·cam (?k??m), William of 1285?-1349? English scholastic philosopher who rejected the reality of universal concepts and argued that mental and linguistic signs are the only genuinely universal features of reality.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.Occam (??k?m) n (Biography) a variant spelling of (William of) OckhamCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Oc?cam Ock?ham (??k ?m) n. William of, died 1349?, English scholastic philosopher. Oc`cam?is?tic, adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.