| Noun | 1. | geographical zone - any of the regions of the surface of the Earth loosely divided according to latitude or longitude climatic zone - any of the geographical zones loosely divided according to prevailing climate and latitude geographic area, geographic region, geographical area, geographical region - a demarcated area of the Earth time zone - any of the 24 regions of the globe (loosely divided by longitude) throughout which the same standard time is used transit zone - a six million square mile area that includes the Caribbean and the Gulf of Mexico and the eastern Pacific Ocean; includes the principal routes used by drug smugglers |