-lithicsuff. Relating to or characteristic of a specified stage in the use of stone by humans: Eolithic.[From lithic.]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.-lithic adj combining form (in anthropology) relating to the use of stone implements in a specified cultural period: Neolithic. [from Greek lithikos, from lithos stone]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014lith?ic (?l?? ?k) adj. 1. pertaining to or consisting of stone. 2. pertaining to clastic rocks containing a large proportion of debris from previously formed rocks. 3. of, pertaining to, or containing lithium. [1790?1800;