To remove impurities or unwanted elements from a substance. The company uses a special process to refine crude oil into gasoline.
To improve something by making small changes. The author decided to refine the manuscript before submitting it to the publisher.
To make a theory, method, or system more precise or effective. The scientists worked to refine their hypothesis based on the new data.
To cultivate or improve someone’s manners, tastes, or character so that they become more polished or cultured. Living abroad helped to refine his social manners and broaden his tastes.