Definition of "recommender" [rec•om•mend•er]

• Agent noun of recommend; one who recommends. (noun)

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• "A: General letters of recommendation are welcome provided they are less than a year old and the recommender is aware that his or her letter is being used."
• "However, librarians now have a number of tools and systems to supplement their efforts, mainly through modern technologies called recommender systems and techniques like collaborative filtering."
• "The technology that now sort-of does this is called recommender systems, and Amazon is considered the gold standard of "if-you-like this, you'll-like-that" programs."