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Word of the Day Tuesday, June 9, 2026

fin

/fɪn/ noun, verb · British & US
Valid in UKValid in US
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What does fin mean?

noun, verb

A fin is a flat, rigid structure, typically found on the back of a fish, used for balance and propulsion. To fin can also mean to provide with a fin or to end or finish something.

Example

"The shark's dorsal fin sliced through the water as it swam."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for fin

Rhymes with fin

Etymologically related