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Definition of fin:

  1. A blade of whalebone.
  2. A feather; a spline.
  3. A finlike appendage, as to submarine boats.
  4. A finlike organ or attachment; a part of an object or product which protrudes like a fin
  5. A fixed stabilizing surface, usually vertical, similar in purpose to a bilge keel on a ship.
  6. A mark or ridge left on a casting at the junction of the parts of a mold.
  7. A membranous, finlike, swimming organ, as in pteropod and heteropod mollusks.
  8. 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.
  9. End; conclusion; object.
  10. The hand.
  11. The thin sheet of metal squeezed out between the collars of the rolls in the process of rolling.
  12. To carve or cut up, as a chub.

Synonyms:

quint, bull bar, phoebe bird, avionics, 5, pectoral fin, quintette, quintet, quintuplet, dorsal fin, armor, greenback, spine, Little Phoebe, armour, louvre, flipper, AWACS, bonnet, altimeter, guide, break water, ridge, flippers, fivesome, the gray dollar, blade, chassis, airfoil, louver, basketball team, body, cinque, C-note, buck, five-spot, fishtail, vanadium, tail fin, vertical stabiliser, anal fin, the grey pound, bay, ballast, vertical fin, aerofoil, pentad, five, balance, axle, quintuple, vent, volt, vertical stabilizer, Phoebe, organ, atomic number 23, paddle, ventral fin, propeller, boot, quin, gill, V, caudal fin, pelvic fin, bodywork, black box, scale, bumper, fins, mandible, aileron, fiver, grand, tailfin, aft.

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