Each of the five regions of the earth's surface into which it was divided by climatic differences, namely the torrid zone (between the tropics), two temperate zones (between the tropics and the polar circles), and two frigid zones (within the polar circles).
Any given region or area of the world.
verb
To divide into or assign sections or areas.
“Please zone off our staging area, a section for each group.”
To define the property use classification of an area.