Meaning of the word jam-packed in English

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

jam-packed

US /ˈdʒæmˌpækt/
UK /ˈdʒæmˌpækt/

Adjective

extremely crowded or full of people or things

Example:
The concert hall was jam-packed with fans.
My schedule is jam-packed next week.