A gap is the space between two things. It can be physical (like "the gap between your two front teeth") or philosophical (like "the generation gap" between you and your parents).

Gap is a small word that packs a lot; it can be used in a straightforward manner: in England, the signs in the subway station say, "Mind the gap" — in hopes that passengers will not wander into the space between the train and the platform. The American retailer, "The Gap," is said to have taken its name from the generation gap. The clothes were designed for teenagers and young adults, and therefore nothing your middle-aged parents would be caught dead in. Times change.

Definitions of gap

n an open or empty space in or between things

“the explosion made a gap in the wall”
Denali Fault
a major open geological fault in Alaska
San Andreas Fault
a major geological fault in California; runs from San Diego to San Francisco; the source of serious earthquakes
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an opening at the corner or on the side of a billiard table into which billiard balls are struck
a gap or vacant space between two teeth
Ranvier's nodes, nodes of Ranvier
small gaps in the myelin sheath of medullated axons
foramen, hiatus
a natural opening or perforation through a bone or a membranous structure
an opening (especially a gap in a dike or fortification)
a deep opening in the earth's surface
cleft, crack, crevice, fissure, scissure
a long narrow opening
an opening into or through something
an opening that resembles a mouth (as of a cave or a gorge)
a gap between cloud masses
rent, rip, snag, split, tear
an opening made forcibly as by pulling apart
an opening that resembles a window in appearance or function
corner pocket
a pocket at the corner of a billiard table
side pocket
a pocket on the side of a billiard table
Monro's foramen, foramen of Monro, interventricular foramen
the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere
foramen magnum
the large opening at the base of the cranium through which the spinal cord passes
abysm, abyss
a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)
a natural opening in something
a hole through which an animal may bolt when pursued into its burrow or den
bullet hole
a hole made by a bullet passing through it
a crack in a lip caused usually by cold
a narrow opening as e.g. between planks in a wall
a small opening or crevice (especially in a rock face or wall)
a deep fissure
fatigue crack
a crack in metal resulting from metal fatigue
break, fault, faulting, fracture, geological fault, shift
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
a deep wide chasm
an accidental hole that allows something (fluid or light etc.) to enter or escape
ozone hole
an area of the ozone layer (near the poles) that is seasonally depleted of ozone
a hole made in something
a hole (as in the wall of a building) made by rats
a narrow fissure in rock
a narrow fissure
a lengthwise crack in wood
vent, volcano
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
a hole in a board where a knot came out
Type of:
an empty area (usually bounded in some way between things)

n a narrow opening

blank, lacuna
a blank gap or missing part
spark gap
the gap between two high-potential terminals
Type of:
a vacant or unobstructed space that is man-made

n a pass between mountain peaks

water gap
a pass in a mountain ridge through which a stream flows
wind gap
a pass in a mountain ridge with no stream flowing through it
Type of:
mountain pass, notch, pass
the location in a range of mountains of a geological formation that is lower than the surrounding peaks

n a conspicuous disparity or difference as between two figures

gap between income and outgo”
Type of:
inequality or difference in some respect

n a difference (especially an unfortunate difference) between two opinions or two views or two situations

generation gap
a difference between the views of young people and their parents
Type of:
conflict, difference, difference of opinion, dispute
a disagreement or argument about something important

n an act of delaying or interrupting the continuity

“there was a gap in his account”
break, disruption, interruption
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cut-in, insert
(film) a still picture that is introduced and that interrupts the action of a film
cut-in, insert
(broadcasting) a local announcement inserted into a network program
interjection, interpellation, interpolation, interposition
the action of interjecting or interposing an action or remark that interrupts
abruption, breaking off
an instance of sudden interruption
barracking, heckling
shouting to interrupt a speech with which you disagree
Type of:
delay, holdup
the act of delaying; inactivity resulting in something being put off until a later time

v make an opening or gap in

Type of:
open, open up
cause to open or to become open

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