The extent is the area something covers. That could be physical space or something like being prosecuted to the full extent of the law.

Use the word extent when you are discussing how far something extends — how far it reaches. If you're an expert, the extent of your knowledge is wide. If you own a lot of property, the extent of your land is huge. The full extent of something is like the limit — that's the end of it. If you've reached the extent of your patience, you're out of patience. If an earthquake destroyed your house, the extent of the damage was severe.

Definitions of extent

n the point or degree to which something extends

“the extent of the damage”
“the full extent of the law”
“to a certain extent she was right”
Type of:
degree, level, point, stage
a specific identifiable position in a continuum or series or especially in a process

n the distance or area or volume over which something extends

“the vast extent of the desert”
“an orchard of considerable extent
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the extent to which something is covered
the extent of land abutting on a street or water
bound, boundary, limit
the greatest possible degree of something
ambit, compass, orbit, range, reach, scope
an area in which something acts or operates or has power or control: "the range of a supersonic jet"
area, expanse, surface area
the extent of a 2-dimensional surface enclosed within a boundary
the property of being the extent of something from beginning to end
deepness, depth
the extent downward or backward or inward
a narrow boundary
absoluteness, starkness, utterness
the quality of being complete or utter or extreme
heat barrier, thermal barrier
a limit to high speed flight imposed by aerodynamic heating
level best, maximum, utmost, uttermost
the greatest possible degree
brink, verge
the limit beyond which something happens or changes
approximate range, ballpark
near to the scope or range of something
a bounded scope
the range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness)
internationalism, internationality
quality of being international in scope
scope for freedom of e.g. action or thought; freedom from restriction
horizon, purview, view
the range of interest or activity that can be anticipated
expanse, sweep
a wide scope
a complete extent or range: "a face that expressed a gamut of emotions"
a broad range of related objects or values or qualities or ideas or activities
palette, pallet
the range of colour characteristic of a particular artist or painting or school of art
acreage, land area
an area of ground used for some particular purpose (such as building or farming)
the area taken up by some object
deepness, profoundness, profundity
the quality of being physically deep
draft, draught
the depth of a vessel's keel below the surface (especially when loaded)
the depth to which something penetrates (especially the depth reached by a projectile that hits a target)
a measure of the depth of water taken with a sounding line
the quality of lacking physical depth
a surface area where something has been erased
blank space, place, space
a blank area
one of the areas between or below or above the lines of a musical staff
balk, baulk
the area on a billiard table behind the balkline
plane section, section
(geometry) the area created by a plane cutting through a solid
Type of:
the property of relative size or extent (whether large or small)

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