The AI-powered English dictionary
plural refiners
Agent noun of refine; one who, or that which, refines. quotations examples
You can think of a search refiner as a filter. Your search for a broad topic might return hundreds of possible results. The refiner allows you to filter this information down based on the configured criteria.
2016, Rosemarie Withee, Ken Withee, Jennifer Reed, Office 365 For Dummies, page 101