cordon

Short definition from Wiktionary

Noun

1. 1
   A ribbon normally worn diagonally across the chest as a decoration or insignia of rank etc.
2. 2
   A line of people or things placed around an area to enclose or protect it.
3. 3
   The arc of fielders on the off side, behind the batsman: the slips and gully.
4. 4
   A woody plant, such as a fruit tree, pruned and trained to grow as a single stem on a support.

Verb

1. 1
   Synonym of cordon off.

Proper noun

1. 1
   A surname.