1N-COUNT [usually plural]脚蹼;橡皮脚掌;鸭脚板Flippers are flat pieces of rubber that you can wear on your feet to help you swim more quickly, especially underwater. 脚蹼;橡皮脚掌;鸭脚板
2N-COUNT [usually plural](海豹等的)鳍状肢,鳍足 The flippers of an animal that lives in water, for example a seal or a penguin, are the two or four flat limbs which it uses for swimming. (海豹等的)鳍状肢,鳍足