e-marketing n 1. (Computer Science) the practice of marketing by means of the internet 2. (Marketing) the practice of marketing by means of the internet [C20: electronic marketing]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014