Definition of fourth dimension in English:

fourth dimension

Syllabification: fourth di·men·sion

noun

  • 1A postulated spatial dimension additional to those determining length, area, and volume.
    More example sentences
    • Their momentum along the fourth dimension would appear as additional mass in three dimensions, so we would observe heavy photons or heavy electrons, for example.
    • The conflicting claims of class and confession represent an additional, necessary fourth dimension to this paradigm.
    • Granted, to the hypercube, the fourth dimension is only another spatial dimension, but to us, the fourth dimension seems to be temporal.
  • 2Time regarded as analogous to linear dimensions.
    More example sentences
    • As things change over time, a fourth dimension needs to be added to politics - and my way of doing this is to argue that what is the right course of action changes with time.
    • Is time just a fourth dimension which, together with the three dimensions of space, helps to comprise a unitary four-dimensional manifold in which all physical objects and events somehow reside?
    • Time as the fourth dimension is basically just a mathematical gimmick to make some relativity equations easier to work with.

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Pronunciation: kərf
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a slit made by cutting with a saw