Definition of fourth dimension in English:

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fourth dimension

Pronunciation: /fôrTH dəˈmen(t)SHən/


1A postulated spatial dimension additional to those determining length, area, and volume.
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.
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.

For editors and proofreaders

Syllabification: fourth di·men·sion

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