| zone fire | artillery or mortar fire delivered in a constant direction at several quadrant elevations |
traffic island
safety island
safety isle
safety zone | a curbed area in a roadway from which traffic is excluded, provides safe area for pedestrians |
twilight zone
no man's land | the ambiguous region between two categories or states or conditions (usually containing some features of both), but there is still a twilight zone, the tantalizing occurrences that are probably noise but might possibly be a signal, in the twilight zone between humor and vulgarity, in that no man's land between negotiation and aggression |
limit
bound
boundary | the greatest possible degree of something, what he did was beyond the bounds of acceptable behavior, to the limit of his ability |
| erogenous zone | any area of the body especially sensitive to sexual stimulation |
language area
language zone | a large cortical area (in the left hemisphere in most people) containing all the centers associated with language |
zone
zona | (anatomy) any encircling or beltlike structure |
| comfort zone | the temperature range (between anddegrees Centigrade) at which the naked human body is able to maintain a heat balance without shivering or sweating |
| boundary condition | (mathematics) a condition specified for the solution to a set of differential equations |
landmark
turning point
watershed | an event marking a unique or important historical change of course or one on which important developments depend, the agreement was a watershed in the history of both nations |
Antarctic
Antarctic Zone
South Frigid Zone | the region around the south pole: Antarctica and surrounding waters |
Arctic
Arctic Zone
North Frigid Zone | the regions to the north of the Arctic Circle centered on the North Pole |
| zone | an area or region distinguished from adjacent parts by a distinctive feature or characteristic |
boundary
bound
bounds | the line or plane indicating the limit or extent of something |
boundary line
border
borderline
delimitation
mete | a line that indicates a boundary |
state line
state boundary | the boundary between two states |
river basin
basin
watershed drainage basin catchment area
catchment basin
drainage area | the entire geographical area drained by a river and its tributaries, an area characterized by all runoff being conveyed to the same outlet, flood control in the Missouri basin |
| zone 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 |
| zone of interior | the part of the theater of war not included in the theater of operations |
Frigid Zone
polar zone
polar region | the part of the Earth's surface forming a cap over a pole, characterized by frigid climate |
benthos
benthic division
benthonic zone | a region including the bottom of the sea and the littoral zones |
littoral
litoral
littoral zone
sands | the region of the shore of a lake or sea or ocean |
loading zone
loading area | a stop where carriers can be loaded and unloaded |
| no-parking zone | a space where automobiles are not allowed to park |
parking space
parking zone | a space where an automobile can be parked |
free port
free zone | an area adjoining a port where goods that are intended for reshipment can be received and stored without payment of duties |
| Temperate Zone | the part of the Earth's surface between the Arctic Circle and the Tropic of Cancer or between the Antarctic Circle and the Tropic of Capricorn, characterized by temperate climate |
| North Temperate Zone | Temperate Zone between the Arctic Circle and the Tropic of Cancer |
| South Temperate Zone | Temperate Zone between the Antarctic Circle and the Tropic of Capricorn |
Torrid Zone
tropical zone
tropics | the part of the Earth's surface between the Tropic of Cancer and the Tropic of Capricorn, characterized by a hot climate |
watershed
water parting
divide | a ridge of land that separates two adjacent river systems |
| zone | a locally circumscribed place characterized by some distinctive features |
buffer zone
buffer | a neutral zone between two rival powers that is created in order to diminish the danger of conflict |
combat zone
combat area | a military area where combat forces operate |
| war zone | a combat zone where military operations are coordinated (especially a designated area in international waters where the rights of neutrals are not respected by nations at war) |
| combat zone tenderloin | a city district known for its vice and high crime rate |
| danger zone | a dangerous area |
demilitarized zone
DMZ | a zone from which military forces or operations or installations are prohibited, tensions exist on both sides of the demilitarized zone separating North Korea and South Korea |
drop zone
dropping zone | an agreed area where military supplies are dropped to ground troops |
kill zone
killing zone | an area where a battle has occurred with many fatalities |
| enterprise zone | a city district where development receives special tax advantages |
| strike zone | (baseball) the area over home plate between a batter's knees and shoulders through which a pitch must pass in order to be called a strike |
| tidal zone | an area subject to tidal action |
| time zone | any of the 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 |
Panama Canal Zone
Canal Zone | a zone consisting of a strip of land across the Isthmus of Panama that contains the Panama Canal |
| abyssal zone | the deep sea ( meters or more) where there is no light |
continental slope
bathyal zone
bathyal district | the steep descent of the seabed from the continental shelf to the abyssal zone |
| neritic zone | the ocean waters from the low tide mark to a depth of about fathoms |