Meaning of the word "be in possession of" in English

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

be in possession of

US /bi ɪn pəˈzɛʃən ʌv/
UK /bi ɪn pəˈzɛʃən ɒv/

Phrase

to have or own something

Example:
The police found him to be in possession of illegal firearms.
You must be in possession of a valid ticket to enter the event.