TNT (t???n-t??)n. A yellow crystalline aromatic compound, C7H5N3O6, used mainly as a high explosive.[t(ri)n(itro)t(oluene).]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.TNT n (Firearms, Gunnery, Ordnance & Artillery) 2,4,6-trinitrotoluene; a yellow solid: used chiefly as a high explosive and is also an intermediate in the manufacture of dyestuffs. Formula: CH3C6H2(NO2)3 Collins 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.TNT (t???n-t??) Short for trinitrotoluene. A yellow, crystalline compound used mainly as an explosive.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.