Meaning of the word "behind closed doors" in English

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

behind closed doors

US /bɪˈhaɪnd kloʊzd dɔrz/
UK /bɪˈhaɪnd kloʊzd dɔːrz/
"behind closed doors" picture

Idiom

in private; in secret

Example:
The negotiations were held behind closed doors.
They discussed the sensitive issue behind closed doors.