TOEFL refine Definition To remove impurities or improve something by making small changes. Example "Scientists refine oil to produce gasoline." Sign in to save TOEFL Quiz → ← referendum refined → Study tips featuring "refine" Map Each Word Into a Connected Network Track How TOEFL Words Behave With Others Group TOEFL Words Around Academic Themes Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze