Meaning of the word "in concert with" in English

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

in concert with

US /ɪn ˈkɑnsərt wɪð/
UK /ɪn ˈkɒnsət wɪð/
"in concert with" picture

Phrase

acting together or in cooperation with someone or something

Example:
The police worked in concert with the FBI to solve the case.
The new policy was developed in concert with community leaders.