Any of the regions of the surface of the Earth loosely divided according to latitude or longitude WordNet 3.0 & Open English WordNet

The five main latitude regions of Earth's surface comprise geographical zones, divided by the major circles of latitude. Wikipedia

Major regions of the Earth's surface demarcated by latitude Wikidata

The region of the earth's surface lying between two parallels of latitude on the earth, one 23°27' north of the equator and the other 23°27' south of the equator, representing the points farthest north and south at which the sun can shine directly overhead and constituting the boundaries of the Torrid Zone. OmegaWiki

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). Wiktionary