Definitions

1. noun

A line of police or soldiers forming a barrier, or a strip of cord or rope used to mark a boundary or to confine something.

“The police set up a cordon to keep the protesters away from the government building.”

2. verb

To surround or enclose something with a barrier or a strip of cord or rope, in order to mark a boundary or to confine it.

“The army cordoned off the area where the bomb went off to prevent panic.”