Noun:
1: zone a circumscribed geographical region characterized by some distinctive features
2: geographical zone, zone any of the regions of the surface of the Earth loosely divided according to latitude or longitude
3: zone an area or region distinguished from adjacent parts by a distinctive feature or characteristic
4: zone, zona (anatomy) any encircling or beltlike structure
Verb:
1: zone, district regulate housing in; of certain areas of towns
2: zone, partition separate or apportion into sections; "partition a room off"