fin

verb

finned; finning

transitive verb

: to equip with fins

intransitive verb

1

: to show the fins above the water

2

: to move through water propelled by fins

Examples of fin in a Sentence

Recent Examples on the Web

Shark finning is the practice of removing a shark’s fins and dumping the rest of the body at sea, the National Oceanic and Atmospheric Administration said. —Don Sweeney april 29, Sacbee.com, 29 Apr. 2026

Everything, from the wheel well curve of the race-winning 1963 Ferrari 250 GTO that sold for $70 million at auction in 2018, to the distinctive rear spoiler on a F40, or the distinctive carbon fiber fins on a limited-edition Ferrari Daytona SP3 was simply beautiful. —Bill Springer, Forbes.com, 19 Feb. 2026

In only three years, traders trafficked fins from over 36,000 illegally caught oceanic whitetip sharks. —Juan Carlos Navarro, Time, 2 Feb. 2026

The true pleasure before or after a treatment, however, comes in stepping out onto the spa’s serene beach and lounging in a chair or hammock under a palm or putting on a mask and fins for a snorkel in the Lagoonarium. —Terry Ward, Condé Nast Traveler, 31 Dec. 2025

Word History

First Known Use

1861, in the meaning defined at intransitive sense 2

Phrases Containing fin

• dorsal fin
• fin de siècle
• fin whale
• lobe-fin
• pectoral fin
• pelvic fin
• swim fin
• tail fin

Rhymes for fin

• been
• bin
• chin
• din
• djinn
• finn
• gin
• grin
• in
• kin
• linn
• linne

Kids Definition

fin

noun

ˈfin

1

: a thin process on the outside of an aquatic animal (as a fish or whale) used in propelling or guiding the body

2

: something shaped like a fin

finlike

-ˌlīk

adjective

finned

ˈfind

adjective