Collaborative filtering Recommender Systems
noun
Definition: A recommendation approach that predicts a user’s preferences on the basis of patterns derived from the behavior, ratings, or choices of many users with similar interests or interaction histories [IBM].
Example in context: “Collaborative filtering is one of the earliest recommendation algorithms.” [Li 2025]
Synonyms: CF; collaborative recommendation
Related terms: recommender system; user-item matrix; neighborhood methods; matrix factorization; content-based recommendation; recommendation algorithm