Definitions of fin

  1. show the fins above the water while swimming; " The sharks were finning near the surface"
  2. equip ( a car) with fins
  3. To carve or cut up, as a chub.
  4. propel oneself through the water in a finning motion
  5. organ of locomotion and balance in fishes and some other aquatic animals
  6. a stabilizer that resembles the fins of a fish
  7. a shoe for swimming; the paddle- like front is an aid in swimming ( especially underwater)
  8. one of a pair of decorations projecting above the rear fenders of an automobile
  9. End; conclusion; object.
  10. An organ of a fish, consisting of a membrane supported by rays, or little bony or cartilaginous ossicles, and serving to balance and propel it in the water.
  11. A membranous, finlike, swimming organ, as in pteropod and heteropod mollusks.
  12. A finlike organ or attachment; a part of an object or product which protrudes like a fin
  13. A blade of whalebone.
  14. A mark or ridge left on a casting at the junction of the parts of a mold.
  15. The thin sheet of metal squeezed out between the collars of the rolls in the process of rolling.
  16. A feather; a spline.
  17. A finlike appendage, as to submarine boats.
  18. A fixed stabilizing surface, usually vertical, similar in purpose to a bilge keel on a ship.
  19. A winglike extension from the body of a fish that helps to move, balance, or steer it in the water.
  20. The organ by which a fish balances itself and swims.
  21. Swimming organ of a fish.
  22. A membranous extension from the body of a fish or other aquatic animal.
  23. A membranous appendage to fishes, supported by little cartilaginous ossicles, by which a fish balances itself and swims in the water; anything like a fin; a thin excrescence on the surface of a casting; a blade of whalebone.
  24. The projecting bony membrane of a fish for support and locomotion.
  25. A fold of skin with fin- rays and skeletal supports, corresponding in the case of the paired fins to limbs, found in most fishes.