Four-dimensional meaning

fôrdĭ-mĕnshə-nəl
Specified by or exhibiting four dimensions, such as the three spatial dimensions and single temporal dimension of relativity theory.
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Of or in four dimensions, esp. in relativity theory where four coordinates are used to record the space location and time of occurrence of each event.
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(algebraic geometry) Having four dimensions; being measurable along four mutually perpendicular axes.
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(physics) Relating to the four dimensions of space-time (three spatial dimensions with the addition of time as the fourth)

We live in a four-dimensional universe.

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