Mula Wiktionary

The Tagalog word sona used to refer the encirclement of a community by police authorities, after which a house to house search is conducted, usually resulting to mass arrest.

Zoning is derived from the tagalog word "sona", a term used by filipinos in World War II. It referred to a practice of the Japanese army to encircleacommunity and flush out all the grown-ip males in search of guerillas.

sona - An area made up of several barangay. A red area usually controlled by a guerilla or communist insurgents.