fourth dimension

noun
|Updated on: 11 Jul 2018

Definition of fourth dimension

1 : a dimension in addition to length, breadth, and depth; specifically : a coordinate in addition to three rectangular coordinates especially when interpreted as the time coordinate in a space-time continuum
2 : something outside the range of ordinary experience

fourth-dimensional

adjective

Recent Examples of fourth dimension from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fourth dimension.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of fourth dimension

1875

in the meaning defined at sense 1

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