1. A British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimetres
   "He ordered a gill of ale at the old-fashioned pub"
    
2. A United States liquid unit equal to 4 fluid ounces
   "The recipe required a gill of cream"
    
3. Any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus
   "The mushroom's gills turned from white to brown as it matured";
   - lamella
    
4. Respiratory organ of aquatic animals that breathe oxygen dissolved in water
   "Fish extract oxygen from water using their branchiae, or gills";
   - branchia
    
5. [UK, dialect] A deep, narrow mountain ravine, especially one with a stream running through it
   "Hikers explored the picturesque gill hidden in the Lake District";
   - ghyll [UK, dialect]

Derived forms: gills

Type of: British capacity unit, Imperial capacity unit, plant organ, respiratory organ, United States liquid unit

Part of: cup, pint

Encyclopedia: Gill, Nakodar