ag·gre·ga·tor (?g?r?-g??t?r)n.1. One that aggregates.2. A website that collects content such as news stories or music files to make such material available in one place.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.aggregator (?æ?r???e?t?) n1. (Commerce) a business organization that collates the details of an individual’s financial affairs so that the information can be presented on a single website2. (Commerce) a firm that brings together a large group of consumers on whose behalf it negotiates reduced rates for good or services, esp in the energy sector3. (Computer Science) a web application that draws together syndicated content from various online sources and displays it in a single location for the user?s convenienceCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014aggregatorAn application that collects input from numerous RSS feeds and displays them in one place.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited