Meaning of the word "be in use" in English

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

be in use

US /bi ɪn juːs/
UK /bi ɪn juːs/

Phrase

to be currently being used or occupied

Example:
The meeting room is in use right now, please wait.
Is this computer in use or can I sit here?