As a Noun: 1. A very common water bird with short legs, webbed feet, a short neck, and a large flat beak. English = duck. 2. The hard, flat mouth of a duck. English = beak, bill. 3. A large bird, like a duck, but with a long neck. English = goose (singular), geese (plural). 4. In cricket, a batsman's score of nought. English = duck. As a Verb or Adjective: 1. Of a duck, to open its beak and make a noise. English = quack.