fin
🇺🇸
/fɪn/
🇬🇧
/fɪn/
A fin is a thin, flat part that comes out from a fish's body. It helps the fish swim and stay balanced in the water.
The fish swam away with a flick of its colorful fin.
A fin is also a thin, flat part on some vehicles, like cars or airplanes. It helps them move better and stay balanced.
The race car had large tail fins that made it look fast and stylish.