1. A stroke of luck
   "Finding the rare coin was just a fluke";
   - good luck, good fortune
    
2. Parasitic flatworms having external suckers for attaching to a host
   "The fluke infected the snail's digestive gland";
   - trematode, trematode worm
    
3. Either of the two lobes of the tail of a cetacean
   "The whale's flukes propelled it through the water"
    
4. Flat bladelike projection on the arm of an anchor
   "The anchor's fluke dug into the seabed, securing the boat";
   - flue
    
5. A barb on a harpoon or arrow
   "The whale was caught by the fluke of the harpoon"

1. Achieve by good luck
   "He fluked a hole-in-one on the difficult par 3"

Derived forms: fluked, flukes, fluking

Type of: barb, flatworm, fortune, luck, platyhelminth, projection, tail

Part of: anchor, blower, cetacean, cetacean mammal, class Trematoda, ground tackle, harpoon, Trematoda

Encyclopedia: Fluke, or I Know Why the Winged Whale Sings