# refine

/ɹəˈfaɪn/ (US) · /ɹɪfˈaɪn/ (UK) · CEFR B2 · Verb

Source: https://englishreference.com/word/refine
Updated: 2026-05-07

## Definition

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.

For teachers: to improve a process, theory, or object by making small, precise adjustments; to remove impurities from a raw substance. Transitive — requires a direct object.

## Examples

- 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.

## Usage notes

- The verb is transitive and takes a direct object.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.