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What does fin mean?

Looking for the meaning or definition of the word fin? Here's what it means.

Noun
  1. (ichthyology) One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.
  2. A similar appendage of a cetacean or other marine animal.
  3. A thin, rigid component of an aircraft, extending from the fuselage and used to stabilise and steer the aircraft.
  4. A similar structure on the tail of a bomb, used to help keep it on course.
  5. 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.
  6. A device worn by divers and swimmers on their feet.
  7. An extending part on a surface of a radiator, engine, heatsink, etc., used to facilitate cooling.
  8. A sharp raised edge (generally in concrete) capable of damaging a roof membrane or vapor retarder.
Verb
  1. (transitive) To cut the fins from a fish, shark, etc.
  2. (intransitive) To swim in the manner of a fish.
  3. (transitive) To provide (a motor vehicle etc) with fins.
Noun
  1. (US, slang) A five-dollar bill.
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