fluke

A fluke is an unexpected stroke of good luck. It was a fluke to find that fifty dollar bill on the ground, and it made you smile for the rest of the day.

The word fluke was first used in 1857 in reference to a lucky shot at billiards. If something good happens to you by chance when you're not expecting it, that's a fluke. The word fluke can also be used in a negative or insulting way. For example, if your favorite sports team loses an important game, you could complain that it was just a fluke that the other team won — meaning they didn't deserve to win and somehow got lucky.

Primary Meanings of fluke

1.
n
a stroke of luck
2.
n
either of the two lobes of the tail of a cetacean
3.
n
parasitic flatworms having external suckers for attaching to a host
4.
n
a barb on a harpoon or arrow
Full Definitions of fluke
1

n a stroke of luck

Synonyms:
good fortune, good luck
Types:
serendipity
good luck in making unexpected and fortunate discoveries
Type of:
fortune, luck
an unknown and unpredictable phenomenon that leads to a favorable outcome
2

n either of the two lobes of the tail of a cetacean

Type of:
tail
the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body

n flat bladelike projection on the arm of an anchor

Synonyms:
flue
Type of:
projection
any structure that branches out from a central support
3

n parasitic flatworms having external suckers for attaching to a host

Synonyms:
trematode, trematode worm
Types:
Fasciola hepatica, liver fluke
flatworm parasitic in liver and bile ducts of domestic animals and humans
Fasciolopsis buski
fluke that is parasitic on humans and swine; common in eastern Asia
blood fluke, schistosome
flatworms parasitic in the blood vessels of mammals
Type of:
flatworm, platyhelminth
parasitic or free-living worms having a flattened body
4

n a barb on a harpoon or arrow

Type of:
barb
a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove

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