tri·ni·tro·tol·u·ene (tr?-n??tr?-t?l?yo?o-?n?) also tri·ni·tro·tol·u·ol (-ôl?, -?l?, -?l?)n. TNT.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.trinitrotoluene (tra??na?tr???t?lj??i?n) or trinitrotoluoln (Firearms, Gunnery, Ordnance & Artillery) the full name for TNTCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014TNT1 , a flammable toluene derivative, C7H5N3O6, used as a high explosive and in the manufacture of dyestuffs and photographic chemicals. Also called trinitrotoluene. [1910?15] TNT2 , Trademark. Turner Network Television (a cable TV channel). Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.tri·ni·tro·tol·u·ene (tr?-n??tr?-t?l?yo?o-?n?) See TNT.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.