fin: meaning, definition, pronunciation and examples
B1Neutral
Quick answer
What does “fin” mean?
The thin, flat appendage on a fish used for propelling, steering, and stabilizing in water.
Audio
Pronunciation
Definition
Meaning and Definition
The thin, flat appendage on a fish used for propelling, steering, and stabilizing in water.
A device or part resembling a fish's fin, used for stability, guidance, or propulsion in various contexts (e.g., automotive, aviation, diving). Also used informally as a slang term for a hand or a US five-dollar bill.
Dialectal Variation
British vs American Usage
Differences
No significant differences in core meaning. The slang term for a hand ('Give me a fin') is slightly more dated and perhaps more associated with American 1950s/60s beatnik culture. The term for a $5 bill is exclusively American.
Connotations
In both varieties, 'fin' in technical contexts (car, plane) is neutral and precise. The slang uses are informal and carry a period-specific, casual connotation.
Frequency
The fish/anatomical meaning is equally common. Technical uses (diving fins, radiator fins) are common in both. Slang meanings are low-frequency and niche.
Grammar
How to Use “fin” in a Sentence
N + V (The fin cuts through the water)V + N (The shark raised its fin)ADJ + N (a prominent dorsal fin)N + of + N (the fin of a dolphin)Vocabulary
Collocations
Examples
Examples of “fin” in a Sentence
verb
British English
- The submariners had to fin their way through the kelp forest.
- The diver finned gently towards the wreck.
American English
- He finned his way to the surface.
- They finned along the reef for an hour.
adverb
British English
- (No standard adverbial use. The word is not used as an adverb.)
American English
- (No standard adverbial use. The word is not used as an adverb.)
adjective
British English
- The car had a distinctive fin design at the rear. (as a noun modifier)
- The fin rays were clearly visible.
American English
- It was a classic fin-back whale. (as a noun modifier)
- He admired the car's finned rear end.
Usage
Meaning in Context
Business
Rare, except in specific industries (aquaculture, automotive cooling systems).
Academic
Common in biology/zoology texts. Also in engineering (heat transfer fins, aerodynamic fins).
Everyday
Common when discussing fish, aquariums, swimming, or scuba diving.
Technical
Precise term in marine biology, aeronautics (vertical stabilizer), automotive engineering (radiator fin), and diving equipment.
Vocabulary
Synonyms of “fin”
Watch out
Common Mistakes When Using “fin”
- Misspelling as 'finn'.
- Using 'fin' to mean 'end' (confusion with French 'fin').
- Overusing slang meanings in formal contexts.
FAQ
Frequently Asked Questions
Yes, primarily in diving and swimming contexts, meaning to propel oneself using fins (e.g., 'We finned along the coral reef').
In biology, 'fin' is the standard term for the appendage on a fish or marine mammal. 'Flipper' is more informal and often refers to the limbs of seals, sea lions, or the flexible swimming gear worn by humans. They are frequently used interchangeably for animals.
No, not in standard English. This is a 'false friend' from French. The English word for 'end' or 'conclusion' is 'end' or 'finish'. The phrase 'fin' alone does not mean end.
Common idioms are rare. Nautical commands like 'fin to the left' exist. Most fixed expressions are technical ('dorsal fin', 'fin stabilizer') or slang ('a fin' for $5).
The thin, flat appendage on a fish used for propelling, steering, and stabilizing in water.
Fin is usually neutral in register.
Fin: in British English it is pronounced /fɪn/, and in American English it is pronounced /fɪn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “fin to the left (nautical: turn left)”
- “fin to the right”
- “live every day like it's Shark Fin Week (humorous, non-standard)”
Learning
Memory Aids
Mnemonic
Imagine a FISH IN water; its FIN helps it swim and win.
Conceptual Metaphor
A FIN IS A GUIDE/STABILIZER (e.g., 'The new policy acted as a fin for the floundering project').
Practice
Quiz
In American slang, a 'fin' can refer to: