gill Meaning and Definition

1. n. respiratory organ of aquatic animals that breathe oxygen dissolved in water

2. n. any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus

3. n. a United States liquid unit equal to 4 fluid ounces

4. n. a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters