Definitions of fluke:
- noun: parasitic flatworms having external suckers for attaching to a host
- noun: either of the two lobes of the tail of a cetacean
- noun: flat blade-like projection on the arm of an anchor
- noun: a barb on a harpoon or arrow
- noun: a stroke of luck
- name: A surname (very rare: popularity rank in the U.S.: #20252)