Fin definition

fĭn
A five-dollar bill.
noun
12
3
A membranous appendage extending from the body of a fish or other aquatic animal, used for propelling, steering, or balancing the body in the water.
noun
5
0
To equip with fins.
verb
4
0
Finnish.
abbreviation
4
0
To emerge with the fins above water.
verb
3
0
Advertisement
To swim, as a fish.
verb
3
0
To lash the water with the fins. Used of a dying whale.
verb
3
0
Finland.
abbreviation
3
0
Finnish.
abbreviation
3
0
The end; finish; conclusion.
noun
3
1
Advertisement
Any of several winglike, membranous organs on the body of a fish, dolphin, etc., used in swimming, turning, and balancing.
noun
2
0
Finished.
abbreviation
2
0
A membranous appendage extending from the body of a fish or other aquatic animal, used for propelling, steering, or balancing the body in the water.
noun
2
0
One of the winglike or paddlelike parts of a fish, dolphin, or whale that are used for propelling, steering, and balancing in water.
2
0
Finance.
abbreviation
1
0
Advertisement
Financial.
abbreviation
1
0
(geo, proper, place) Finland.
abbreviation
1
0
A raised source-to-drain channel in a transistor. See FinFET and transistor.
1
0
Something resembling a fin in shape or function, as:
  • A covering for the foot having a flat flexible portion made of rubber or plastic that widens as it extends forward from the toes, used to provide enhanced propulsion in swimming and diving.
  • A fixed or movable airfoil used to stabilize an aircraft, missile, or projectile in flight.
  • A thin, usually curved projection attached to the rear bottom of a surfboard for stability.
  • A projecting vane used for cooling, as on a radiator or an engine cylinder.
noun
1
1
Anything like a fin in shape or use.
  • Any narrow edge or ridge formed in manufacturing, as on a casting by metal forced through the halves of the mold.
  • Any vertical airfoil, fixed or movable, whose chief function is to give stability in flight.
  • A stabilizing or steering projection on boats or submarines.
  • (slang) A hand or arm.
noun
1
1
Advertisement
The definition of a fin is a wing-like limb attached to many animals living in water, used for swimming and balance.

An example of a fin is what fish use for swimming in the water.

An example of a fin is what sticks out of the water when a shark is near the surface.

noun
0
0
Fin is a French term meaning the end or finish.

An example of fin is the end of a French movie.

noun
0
0
The ISO 3166-1 three-letter (alpha-3) code for Finland.
symbol
0
0
Commune in the Somme department in France.
pronoun
0
0
To move the fins, esp. in a violent way.
verb
1
2
Advertisement
(slang) A five-dollar bill.
noun
1
2

Other Word Forms

Noun

Singular:
fin
Plural:
fins

Origin of fin

  • Yiddish finf five from Old High German funf, finf penkwe in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle English from Old English finn

    From American Heritage Dictionary of the English Language, 5th Edition