Definition of fly fishing noun from the Oxford Advanced Learner's Dictionary

 

fly fishing

 noun
noun
BrE
 
; NAmE
 
[uncountable]
 
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the sport of fishing in a river or lake using an artificial fly at the end of the line to attract and catch the fish Culture The flies float on, or move just under, the surface of the water instead of sinking like worms, and are attractive to salmon and trout. Fly fishing requires a lot of skill, and it is considered a higher-class sport than using live bait.
See the Oxford Advanced American Dictionary entry: fly fishing