refine
v. B2 Upper Intermediate US //ɹəˈfaɪn// UK //ɹɪfˈaɪn// re·fine
v. to make small changes to something to make it better or more exact. You use this when you want to improve a plan, a skill, or a substance like oil.
v. to improve a process, theory, or object by making small, precise adjustments; to remove impurities from a raw substance. Transitive — requires a direct object.
The chef needs to refine the recipe before the opening night.
The research team spent months gathering data to refine their hypothesis about climate change.
While the initial prototype demonstrated the core concept, the engineers had to refine the internal mechanics to ensure the device could withstand daily use in extreme temperatures.
From re- + fine.
Usage
The verb is transitive and takes a direct object.