<p><strong>Noun:</strong></p><ul><li>any continuous area that differs in some respect, or is distinguished for some purpose, from adjoining areas, or within which certain distinctive circumstances exist or are established.</li><li>Synonyms: region</li><li>Geography: any of five great divisions of the earth's surface, bounded by lines parallel to the equator and named according to the prevailing temperature.</li><li>Biogeography: an area characterized by a particular set of organisms, whose presence is determined by environmental conditions, as an altitudinal belt on a mountain.</li><li>Geology: a horizon.</li><li>Geometry: a part of the surface of a sphere included between two parallel planes.</li><li>a specific district, area, etc., within which a uniform charge is made for transportation, mail delivery, or other service.</li><li>an area or district in a city or town under special restrictions as to the type, size, purpose, etc., of existing or proposed buildings.</li><li>time zone.</li><li>Sports: a particular portion of a playing area.</li><li>the zone, Informal: a state of intense concentration and focus that greatly improves a person's performance in a physical or mental activity, especially in sports.</li><li>Archaic: a girdle or belt; cincture.</li></ul><p><strong>Verb:</strong></p><ul><li>to mark with zones or bands.</li><li>to divide into zones, tracts, areas, etc., as according to existing characteristics or as distinguished for some purpose.</li><li>to divide (a city, town, neighborhood, etc.) into areas subject to special restrictions on any existing or proposed buildings.</li><li>to encircle or surround with a zone, girdle, belt, or the like.</li><li>Synonyms: band, gird.</li></ul>