Meaning & use
fin
A thin, flat body part on a fish or other aquatic animal, used for balance and movement through water.
See it in a sentence
The shark's dorsal fin sliced through the surface as it circled the boat.
Divers wear rubber fins on their feet to swim faster underwater.
A note on using this word
Also names the fixed, wing-like part on a car, rocket, or surfboard that improves stability.
Words with a similar meaning
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