Cordon (noun)

1. A line or ring of police or soldiers standing or moving around a particular area to prevent people from entering or leaving.
2. A line of people or things standing or moving around a particular area.
3. A ribbon or cord worn as a badge of office.

Origin:

Late 16th century (in the sense "ribbon or cord worn as a badge of office"): from french, "ribbon, cord", from corde "cord".

Examples:

1. The police set up a cordon around the crime scene.
2. The crowd was held behind a cordon.
3. The cordon was made of plastic barriers.
4. He wore a cordon as a badge of his office.
5. The cordon was made of red and gold ribbon.