1. To attenuate or reduce in vigor, strength, or validity by polishing or purifying
2. To make more precise or increase the discriminatory powers of
3. To reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
4. To treat or prepare so as to put in a usable condition
Rendre plus pur.
1. Punir.
2. Corriger.
1. Purifier. Raffiner le pétrole.
2. Fignoler. Raffiner des détails.