fourth dimension: meaning, definition, pronunciation and examples
C1/C2Formal, Technical, Literary
Quick answer
What does “fourth dimension” mean?
A hypothetical dimension beyond the three spatial dimensions (length, width, and height), often identified as time in physics.
Audio
Pronunciation
Definition
Meaning and Definition
A hypothetical dimension beyond the three spatial dimensions (length, width, and height), often identified as time in physics.
A realm or mode of experience beyond ordinary perception; an abstract, complex, or unconventional aspect of a subject.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; concept is identical in both varieties.
Connotations
Same core meaning, though figurative use is equally common in both cultures.
Frequency
Equally common in scientific and popular discourse in both BrE and AmE.
Grammar
How to Use “fourth dimension” in a Sentence
the fourth dimension of [ABSTRACT NOUN]in the fourth dimensionVocabulary
Collocations
Examples
Examples of “fourth dimension” in a Sentence
verb
British English
- The theory fourth-dimensions time in a novel way.
American English
- The model fourth-dimensions the data spatially and temporally.
adverb
British English
- The object seemed to move fourth-dimensionally.
American English
- He thought fourth-dimensionally about the problem.
adjective
British English
- It was a fourth-dimensional experience.
American English
- They discussed fourth-dimensional geometry.
Usage
Meaning in Context
Business
Rare. Figuratively: 'Data analytics adds a fourth dimension to our market understanding.'
Academic
Common in physics, philosophy, mathematics, and literary theory.
Everyday
Rare, except in figurative or sci-fi contexts.
Technical
Standard term in relativity physics and geometry.
Vocabulary
Synonyms of “fourth dimension”
Strong
Neutral
Weak
Vocabulary
Antonyms of “fourth dimension”
Watch out
Common Mistakes When Using “fourth dimension”
- Using 'the fourth dimension' to mean simply 'a different aspect' without the spatial/temporal metaphor.
- Confusing it with 'third dimension' (3D).
- Capitalizing incorrectly (not a proper noun unless in a title).
FAQ
Frequently Asked Questions
In the context of relativity physics, yes, it is time. In mathematics and geometry, it can refer to any fourth spatial or abstract dimension.
We perceive the effects of time (the temporal fourth dimension), but we cannot visually perceive a fourth spatial dimension.
It is a legitimate scientific term in physics and mathematics, but it is also widely used in science fiction and figurative language.
'Dimension' is a general term for a measurable extent. 'Fourth dimension' specifically refers to the one beyond the three familiar spatial dimensions.
A hypothetical dimension beyond the three spatial dimensions (length, width, and height), often identified as time in physics.
Fourth dimension is usually formal, technical, literary in register.
Fourth dimension: in British English it is pronounced /ˌfɔːθ daɪˈmenʃn/, and in American English it is pronounced /ˌfɔːrθ dɪˈmenʃn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “A fourth dimension to something (adds complexity/depth)”
Learning
Memory Aids
Mnemonic
Think of a 3D cube moving through TIME - that movement creates the fourth dimension.
Conceptual Metaphor
TIME IS A DIMENSION / THE UNKNOWN IS A HIGHER DIMENSION
Practice
Quiz
In which field is 'fourth dimension' most precisely defined?