types:
- show 39 types...
- hide 39 types...
-
hairline
the natural margin formed by hair on the head
-
frontier
an international boundary or the area (often fortified) immediately inside the boundary
-
heliopause
the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet
-
border, borderline, boundary line, delimitation, mete
a line that indicates a boundary
-
bourn, bourne
an archaic term for a boundary
-
district line
the boundary between two districts
-
county line
the boundary between two counties
-
city line
the boundary of a city
-
border, edge
the boundary of a surface
-
end
a boundary marking the extremities of something
-
demarcation, demarcation line, limit
the boundary of a specific area
-
lineation, outline
the line that appears to bound an object
-
surface
the extended two-dimensional outer boundary of a three-dimensional object
-
shoreline
a boundary line between land and water
-
edge
the outside limit of an object or area or surface; a place farthest away from the center of something
-
interface
(chemistry) a surface forming a common boundary between two things (two objects or liquids or chemical phases)
-
hard palate
the bony part of the roof of the mouth
-
palate, roof of the mouth
the upper surface of the mouth that separates the oral and nasal cavities
-
face, side
a surface forming part of the outside of an object
-
circuit, circumference
the boundary line encompassing an area or object
-
fence line
a boundary line created by a fence
-
property line
the boundary line between two pieces of property
-
state boundary, state line
the boundary between two states
-
brink
the edge of a steep place
-
celestial sphere, empyrean, firmament, heavens, sphere, vault of heaven, welkin
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
-
city limit, city limits
the limits of the area occupied by a city or town
-
end
the surface at either extremity of a three-dimensional object
-
inside, interior
the inner or enclosed surface of something
-
limb
(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
-
upper limit
the limit on the upper (or northernmost) side of something
-
lower limit
the limit on the lower (or southernmost) side of something
-
coastline
the outline of a coast
-
silhouette
an outline of a solid object (as cast by its shadow)
-
exterior, outside
the outer side or surface of something
-
skyline
the outline of objects seen against the sky
-
substrate, substratum
a surface on which an organism grows or is attached
-
three-mile limit
the limit of a nation's territorial waters
-
wave front, wavefront
(physics) an imaginary surface joining all points in space that are reached at the same instant by a wave propagating through a medium
-
photosphere
the intensely luminous surface of a star (especially the sun)