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
Prečistiti, prečišćavati (šećer, petrolej i dr.); očistiti metal; praviti finijim, profiniti. (fr.)