1. broad flat limbs of sea animals (such as seals, whales, or sea turtles) used for swimming
2. rubber footwear with broad flat extensions worn for swimming or diving to help propel through water

Examples

• The seal used its powerful flippers to glide through the water.
• Sea turtles have large flippers that help them navigate ocean currents.
• The whale’s flippers were visible as it surfaced near the boat.
• She put on her flippers before entering the pool for swim practice.
• The scuba diver’s flippers helped him move efficiently underwater.
• Penguins use their flippers like wings to ‘fly’ through the water.
• The snorkeling gear included a mask, snorkel, and flippers.