fourth dimension
Beyond spatial coordinates
The fourth dimension extends geometry beyond the three spatial dimensions we perceive.
In physics, time serves as the fourth dimension, uniting space and time into spacetime.
In mathematics, it refers to a hypothetical spatial dimension perpendicular to all three we know—impossible to visualize but useful in calculations.
Figuratively, the fourth dimension suggests a realm beyond ordinary perception: His music seems to exist in the fourth dimension.
Four-dimensional cubic solid
- hypercubeMulti-dimensional cubic figure
- hypersphereHigher-dimensional spherical surface
- manifoldMany and various
- topologyStudy of spatial arrangement
vector · projection · extrusion · linear algebra · coordinate · axis · perpendicular · spatial
Merged dimensional framework
- EinsteinByword for genius
- time dilationClocks slow at speed
- special relativityTheory uniting space, time
- general relativityGravity as curved spacetime
frame of reference · invariance · causality · twin paradox · simultaneity · inertial · observer · velocity
Relating to chronology
- durationLength of existence
- chronologyTemporal ordering of events
- pastTime already gone
- presentGift or current moment
future · simultaneity · eternal · moment · timeline · arrow of time · entropy · causation
Collapsed star's remnant
- wormholeHypothetical spacetime tunnel
- singularityPoint where values explode
- event horizonBlack hole's edge
- big bangLoud explosive noise
cosmic inflation · gravitational waves · dark matter · dark energy · redshift · universe · multiverse · Hubble
Philosophy of existence's nature
- ontologyStudy of existence's nature
- phenomenologyStudy of subjective experience
- perceptionMental interpretation of stimuli
- consciousnessState of sentient awareness
reality · abstraction · Plato · idealism · conceptual · epistemology · existence · immaterial
Beyond ordinary experience
- metaphysicalBeyond the material realm
- otherworldlySeemingly not earthly
- etherealDelicate beyond earthly measure
- supernaturalBeyond natural explanation
esoteric · occult · mystical · numinous · ineffable · cosmic consciousness · astral · spiritual
tesseract
Four-dimensional cubic solid
- hypercubeMulti-dimensional cubic figure
- hypersphereHigher-dimensional spherical surface
- manifoldMany and various
topology · vector · projection · extrusion · linear algebra · coordinate · axis · perpendicular · spatial · mathematics
spacetime
Merged dimensional framework
- EinsteinByword for genius
- time dilationClocks slow at speed
- special relativityTheory uniting space, time
general relativity · frame of reference · invariance · causality · twin paradox · simultaneity · inertial · observer · velocity · space-time continuum
temporal
Relating to chronology
- durationLength of existence
- chronologyTemporal ordering of events
- pastTime already gone
present · future · simultaneity · eternal · moment · timeline · arrow of time · entropy · causation · sequence
black hole
Collapsed star's remnant
- wormholeHypothetical spacetime tunnel
- singularityPoint where values explode
- event horizonBlack hole's edge
big bang · cosmic inflation · gravitational waves · dark matter · dark energy · redshift · universe · multiverse · Hubble · nebula
metaphysics
Philosophy of existence's nature
- ontologyStudy of existence's nature
- phenomenologyStudy of subjective experience
- perceptionMental interpretation of stimuli
consciousness · reality · abstraction · Plato · idealism · conceptual · epistemology · existence · immaterial · transcendence
transcendental
Beyond ordinary experience
- metaphysicalBeyond the material realm
- otherworldlySeemingly not earthly
- etherealDelicate beyond earthly measure
supernatural · esoteric · occult · mystical · numinous · ineffable · cosmic consciousness · astral · spiritual · paranormal
- Number Phrasesone and only, two cents, three strikes, four corners, five senses
- realmsrealm, kingdom, domain, Heaven, Hades
- CubismPablo Picasso, cubism, Georges Braque, Picasso, Braque
- dimensions2D, 3D, 4D, height, width
- metaphysical conceptssoul, spirit, free will, determinism, afterlife
- parallel worldsparallel worlds, alternate universe, alternate reality, alternate world, mirror universe
fourth dimensionphysical space
Area with three dimensions
spatial dimensions · here and now · timelessness · Cartesian coordinates
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