1
: an external membranous process of an aquatic animal (such as a fish) used in propelling or guiding the body see fish illustration
2
: something resembling a fin: such as
b(1)
: an appendage of a boat (such as a submarine)
(2)
: an airfoil attached to an airplane for directional stability
c
d
: any of the projecting ribs on a radiator or an engine cylinder
finned; finning
: to equip with fins
slang
: a 5-dollar bill
1
finance; financial
2
finish
Examples of fin in a Sentence
Recent Examples on the Web
Melissa Cristina Márquez, Forbes.com, 7 Apr. 2025
Add a claustrophobic mask, a straw-like snorkel, fins that can weigh you down, plus waves and strong currents, can lead to a casual activity quickly turning into a high-intensity workout.
—Jen Murphy, Outside Online, 2 Apr. 2025
Tim Newcomb, Forbes.com, 16 Apr. 2025
To offset poverty wages, ship captains typically allow their crew to supplement their income by keeping the fins to sell at port, off books.
—Ian Urbina, Los Angeles Times, 28 Mar. 2025
See All Example Sentences for fin
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Verb
Even though efforts have been made internationally to reduce wasteful practices like finning and to set catch limits, global shark mortality remains high.
—Melissa Cristina Márquez, Forbes.com, 7 Apr. 2025
Add a claustrophobic mask, a straw-like snorkel, fins that can weigh you down, plus waves and strong currents, can lead to a casual activity quickly turning into a high-intensity workout.
—Jen Murphy, Outside Online, 2 Apr. 2025
Noun
The site also hosts pop-up experiences throughout the weekend, which includes a live ceviche station, a roaming ice cream cart, a walking cannoli experience, blue fin tuna carving and tasting and caviar tastings.
—Tim Newcomb, Forbes.com, 16 Apr. 2025
To offset poverty wages, ship captains typically allow their crew to supplement their income by keeping the fins to sell at port, off books.
—Ian Urbina, Los Angeles Times, 28 Mar. 2025
See All Example Sentences for fin
Cite this Entry
“Fin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fin. Accessed 20 Apr. 2025.
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