tek·tite (t?k?t?t?)n. Any of numerous generally small, rounded, dark brown to green glassy objects that are composed of silicate glass and are thought to have been formed by the impact of a meteorite with the earth’s surface.[Greek t?ktos, molten (from t?kein, to melt) + -ite.]tek·tit?ic (-t?t??k) 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.tektitic (t?k?t?t?k) adj (Geological Science) geology relating to tektitesCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014