Definition of zone:

• To girdle; to encircle.
• regulate housing in; of certain areas of towns
• separate or apportion into sections; " partition a room off"
• any of the regions of the surface of the Earth loosely divided according to latitude or longitude
• an area or region distinguished from adjacent parts by a distinctive feature or characteristic
• An area or part of a region characterized by uniform or similar animal and plant life; a life zone; as, Littoral zone, Austral zone, etc.
• A series of faces whose intersection lines with each other are parallel.
• The aggregate of stations, in whatsoever direction or on whatsoever line of railroad, situated between certain maximum and minimum limits from a point at which a shipment of traffic originates.
• Any circular or ring- shaped area within which the street- car companies make no differences of fare.
• In the United States parcel- post system, any of the areas about any point of shipment for which but one rate of postage is charged for a parcel post shipment from that point. The rate increases from within outwards. The first zone includes the unit of area "( a quadrangle 30 minutes square)" in which the place of shipment is situated and the 8 contiguous units; the outer limits of the second to the seventh zones, respectively, are approximately 150, 300, 600, 1000, 1400, and 1800 miles from the point of shipment; the eighth zone includes all units of area outside the seventh zone.
• A girdle; a cincture.
• One of the five great divisions of the earth, with respect to latitude and temperature.
• A band or stripe extending around a body.
• A band or area of growth encircling anything; as, a zone of evergreens on a mountain; the zone of animal or vegetable life in the ocean around an island or a continent; the Alpine zone, that part of mountains which is above the limit of tree growth.
• A series of planes having mutually parallel intersections.
• Circuit; circumference.
• One of the five great belts into which the surface of the earth is divided with regard to climate: including the torrid zone, which extends 23˚ 28' on each side of the equator; the two temperate zones, between the tropics and the polar circles, which are 23˚ 27' from the poles; and the two frigid zones, between th epolar circles and the poles; an area or region distinct from adjoining parts; as, during the World War, Germany established a danger zone for submarine warfare; in the United States parcel post system, one of the areas into which the country is divided with regard to rates of postage.
• Zona ( 1). For the various zones in anatomy, see under zona.
• See Zona.
• A girdle: one of the five great belts into which the surface of the earth is divided.
• A girdle; belt; one of the five climatic divisions of the earth.
• A belt or girdle.
• One of five divisions of the earth's surface, bounded by lines parallel to the equator and taking their names from the prevailing climate.
• A belt, band, stripe, etc., distinguished by any characteristic.
• A girdle; a division of the earth with respect to the temperature of different latitudes; there being five zones, the torrid, two temperate, and two frigid zones; a band or stripe running round any object; circuit; circumference.
• A circular belt or girdle; one of the five great divisions of the earth with respect to latitude and temperature, marked out by the two tropics and the polar circles, and respectively named the torrid zone, north temperate zone, south temperate zone, north frigid zone, and south frigid zone; in math., the portion of the surface of a sphere included between two parallel planes; a band or stripe running round any object; a band or area encircling anything; circumference.
• An area characterized by a similar fauna or flora; a stratum or set of beds characterized by a typical fossil or set of fossils.
• [ Greek] An area characterized by a similar fauna or flora( biol.); a stratum or set of beds characterized by a typical fossil or set of fossils( pal.).
• Zoned.

Usage examples for zone

1. The other, and more important one, is that the search for planetoids has naturally been carried on in that comparatively narrow zone within which most of their orbits fall; and that, consequently, those having the most highly- inclined orbits are the least likely to have been detected, especially if they are at the same time among the smallest.  Essays: Scientific, Political, & Speculative, Vol. I by Herbert Spencer

2. Then I was sea- sick, and when we got into the hot zone- my, how bad I was!  For the Sake of the School by Angela Brazil

3. The Mexicans would not concede the right of the United States to send an armed expedition into their country at any time, and the Americans refused to accept limitations on the kind of troops that they might employ or on the zone of their operations.  The Hispanic Nations of the New World Volume 50 in The Chronicles Of America Series by William R. Shepherd