Meaning of the word "preach to the choir" in English

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

preach to the choir

US /priːtʃ tu ðə kwaɪər/
UK /priːtʃ tu ðə kwaɪər/
"preach to the choir" picture

Idiom

1.

to try to persuade people to believe things that they already believe

Example:
When I talk about the importance of environmental protection to this group, I feel like I'm preaching to the choir.
You don't need to convince me; you're preaching to the choir.
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