Meaning of the word "stroke of luck" in English

What does "stroke of luck" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

stroke of luck

US /strəʊk əv lʌk/
UK /strəʊk əv lʌk/

Idiom

an unexpected piece of good fortune

Example:
Finding that lost wallet was a real stroke of luck.
It was a stroke of luck that we arrived just as the store was opening.