finn
word
Definition
A 'finn' is a flat part attached to a fish or other aquatic animal that helps it swim. It can also refer to similar parts used on objects like surfboards, submarines, or missiles to help with movement and stability in water or air.
Usage & Nuances
Mostly used in scientific, marine, and sporting contexts. 'Finn' can refer both to animal body parts and manmade parts (like surfboard fins), but it's usually spelled 'fin' in standard English—'finn' is sometimes a less common or variant spelling. Do not confuse with 'Finn' (a person from Finland).
Example Sentences
The fish moved its finns to change direction.
basic
My surfboard has a broken finn.
basic
Dolphins use their finns to steer through the water.
natural
When the finn broke off, the model rocket couldn't fly straight.
natural
You can spot a shark by looking for its finn above the water.
natural
A shark’s finn helps it swim quickly.
basic