Meaning of the word "be the case" in English

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

be the case

US /bi ðə keɪs/
UK /bi ðə keɪs/

Idiom

to be true or to be a fact

Example:
If that be the case, we need to act quickly.
I hope that won't be the case.