the process of removing impurities (as from oil or metals or sugar etc.)
"The new refinery is working around the clock to refine crude oil into gasoline and diesel fuel for the region."
Refinement (process of refining)
"The team spent weeks refining the algorithm to reduce processing errors by half."
present participle of refine
"The team is refining the product design based on customer feedback to ensure it meets all safety standards."