Meaning of the word "knock on wood" in English

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

knock on wood

US /nɑk ɑn wʊd/
UK /nɑk ɑn wʊd/
"knock on wood" picture

Idiom

1.

said to ward off bad luck, often while knocking on a wooden object

Example:
I haven't had a cold all winter, knock on wood.
Our business has been doing great this year, knock on wood.
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