General Science

Cars & Driving

  • noun the removal of dirt or suspended particles from a liquid or the air with the aid of a filter


  • noun the action of passing a liquid through a filter


  • the process of removing solid matter or impurities from a wine by pouring the liquid through a very fine filter. It is quicker but more expensive than letting the wine settle naturally. Filtration, like fining, improves the colour of a wine and provides a clarity to the liquid; it is used particularly with white wines. The process also removes any unwanted bacteria and yeasts still present in the wine that might continue to ferment once the wine has been bottled. The drawback is that filtering can remove some of the taste and character of a wine and so it is avoided in fine wines.