N-type (?n?t?p?)adj. Made of material, usually a semiconductor such as silicon, that has been doped with impurities so that it has an excess of conductive electrons.[n(egative)-type, from the negative charge of the conductive electrons.]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.n-type adj 1. (Electronics) (of a semiconductor) having more conduction electrons than mobile holes 2. (Electronics) associated with or resulting from the movement of electrons in a semiconductor: n-type conductivity. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014