fourth dimension
noun
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
adjectiveFrom the M-W Editors
First Known Use of fourth dimension
1875
Learn More about fourth dimension
Seen and Heard
What made you want to look up fourth dimension? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!