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The meaning of FIN is an external membranous process of an aquatic animal (such as a fish) used in propelling or guiding the body.

any part, as of a mechanism, resembling a fin. Metallurgy. a ridge of metal squeezed through the opening between two rolls, dies, or halves of a mold in which a piece is being formed under pressure.

FIN meaning: 1 : a thin flat part that sticks out from the body of a fish and is used in moving or guiding the fish through water; 2 : a part on a machine (such as a car or airplane) that is shaped like a fish's fin

FIN meaning: 1. a thin vertical part sticking out of the body of especially a fish or an aircraft that helps…. Learn more.

FIN in British English abbreviation for Finland (international car registration)

Dec 14, 2025 · A hairstyle, resembling the fin of a fish, in which the hair is combed and set into a vertical ridge along the top of the head from about the crown to the forehead.

Definition of fin noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

fin (fɪn) n slang US a five-dollar bill [from Yiddish finf five, ultimately from Old High German funf, finf]

A fin is the part of a fish's body that protrudes into the water and helps it balance and move in various directions. Sharks use their dorsal fins to stabilize their bodies as they propel through the water. Fish, …