E·ther·net (??th?r-n?t?) A trademark for a LAN protocol.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.Ethernet (?i????n?t) n (Computer Science) trademark computing a widely used type of local area networkCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014E?ther?net (?i ??r?n?t) Trademark. a local-area network protocol featuring a bus topology and a 10 megabit per second data transfer rate. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.