perimeters
Lines around shapes
Perimeters is the plural of perimeter—the outer boundary or edge of an enclosed area.
In geometry, the perimeter is the total length around a shape: Calculate the perimeters of these triangles.
More broadly, perimeters mark defensive boundaries: Guards patrolled the perimeters of the compound.
Security perimeters establish controlled zones around sensitive locations.
Outer limits or boundaries
- bordersLines separating regions
- limitsImposed maximum points
- marginsEdges of a page
- outlinesExternal boundaries or summaries
fringes · confines · peripheries · bounds · rims · extremities · demarcations · circumferences
Circle's outer measurement
- measurementDetermining size or amount
- lengthMeasure of extent
- calculationMathematical problem-solving process
- polygonMultisided plane figure
rectangle · square · triangle · formula · sides · enclosure · area · dimensions
Protection against harm
- fortificationStrengthening defenses or nutrients
- baseSupporting bottom structure
- outpostRemote military station
- encampmentTemporary military or refugee settlement
stronghold · tactical · positions · sentries · reconnaissance · breach · infiltration · enemy lines
Combat with blunted blades
- surveillanceSystematic observation of subjects
- guardsProtectors or watchmen
- patrolRegular surveillance route
- checkpointsInspection stations along routes
barriers · intrusion detection · access control · sentries · watchtowers · motion sensors · razor wire · security cameras
Painted boundaries on playing surfaces
- sidelinesField boundary lines
- end linesField boundary markings
- out of boundsBeyond permitted limits
- baselineStandard for comparison
edges
Outer limits or boundaries
outlines · fringes · confines · peripheries · bounds · rims · extremities · demarcations · circumferences · outer limits
circumference
Circle's outer measurement
- measurementDetermining size or amount
- lengthMeasure of extent
- calculationMathematical problem-solving process
polygon · rectangle · square · triangle · formula · sides · enclosure · area · dimensions · vertices
defense
Protection against harm
- fortificationStrengthening defenses or nutrients
- baseSupporting bottom structure
- outpostRemote military station
encampment · stronghold · tactical · positions · sentries · reconnaissance · breach · infiltration · enemy lines · forward operating base
fencing
Combat with blunted blades
- surveillanceSystematic observation of subjects
- guardsProtectors or watchmen
- patrolRegular surveillance route
checkpoints · barriers · intrusion detection · access control · sentries · watchtowers · motion sensors · razor wire · security cameras · alarm systems
court lines
Painted boundaries on playing surfaces
- sidelinesField boundary lines
- end linesField boundary markings
- out of boundsBeyond permitted limits
perimetersareas
Bounded sections of space
volumes · surface areas · square footage · acreage · interiors
perimetersheadquarters
Central command location
command centers · bases · strongholds · protected zones · inner sanctums
- perimeter fenceBarrier enclosing an area's edges
- security perimeterControlled boundary around protected area
- perimeter defenseOuter boundary protection system
- secure perimeterProtected boundary around location
- safety perimeterBoundary around hazards
- defensive perimeterFortified boundary around position