Refine means to which of the following?

• A. To purify; to take impurities out of something
• B. To make changes in order to improve something
• C. To cook or bake to a higher degree
• D. To remove dust from a surface

Answer: (A)

Refine primarily means removing impurities to produce a purer form. This purification sense is the most direct and standard definition of the verb, so it fits best with the idea of taking away unwanted substances to improve purity—like refining metal, crude oil, or sugar. You’ll notice this sense in contexts where the goal is to obtain a purer material by processes that strip away impurities. You can also use refine in a more metaphorical way to mean making something better or more precise, but that’s an extended usage rather than the core meaning. The other options describe cleaning or cooking, which are different actions and don’t capture the main idea of purification.