time dilation: meaning, definition, pronunciation and examples
LowFormal/Academic/Technical
Quick answer
What does “time dilation” mean?
A relativistic effect in physics where time passes at different rates for observers in different gravitational fields or moving at different velocities relative to each other.
Audio
Pronunciation
Definition
Meaning and Definition
A relativistic effect in physics where time passes at different rates for observers in different gravitational fields or moving at different velocities relative to each other.
In popular culture, sometimes used metaphorically to describe experiences where time seems to pass at different speeds (e.g., during stress, excitement, or altered states).
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences.
Connotations
Identical in scientific contexts; metaphorical extension is equally rare in both varieties.
Frequency
Equally low frequency in both UK and US, limited to physics/astrophysics discussions.
Grammar
How to Use “time dilation” in a Sentence
Time dilation occurs when...Time dilation is predicted by...The time dilation between... is...to experience time dilationVocabulary
Collocations
Examples
Examples of “time dilation” in a Sentence
verb
British English
- Time dilates near massive objects.
- The moving clock dilates time relative to the stationary one.
American English
- Time dilates as velocity approaches light speed.
- Gravity dilates time in strong fields.
adverb
British English
- The clock ran time‑dilatingly slower.
- (Note: adverbial use is extremely rare and awkward; not recommended.)
American English
- (No natural adverbial usage in American English.)
adjective
British English
- The time‑dilation effect is minuscule at everyday speeds.
- We accounted for time‑dilation corrections.
American English
- The time‑dilation factor is crucial for GPS accuracy.
- Time‑dilation experiments confirm relativity.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Physics, astrophysics, engineering, philosophy of science.
Everyday
Extremely rare, possibly in sci‑fi discussions.
Technical
Core term in relativity theory, satellite navigation (GPS).
Vocabulary
Synonyms of “time dilation”
Strong
Neutral
Weak
Vocabulary
Antonyms of “time dilation”
Watch out
Common Mistakes When Using “time dilation”
- Using ‘time dilation’ for simple slowdowns (e.g., boredom).
- Spelling ‘dilatation’ (medical term).
- Treating it as a verb (‘time dilates’ is rare; prefer ‘time dilation occurs’).
FAQ
Frequently Asked Questions
It is experimentally verified, e.g., in particle accelerators and GPS systems.
No, the effects are far too small at everyday speeds and Earth’s gravity.
Not in the classic sci‑fi sense, but it does allow ‘travel’ into the future relative to another frame.
The effect arises from Einstein’s special (1905) and general (1915) relativity theories.
A relativistic effect in physics where time passes at different rates for observers in different gravitational fields or moving at different velocities relative to each other.
Time dilation is usually formal/academic/technical in register.
Time dilation: in British English it is pronounced /ˈtaɪm daɪˌleɪ.ʃən/, and in American English it is pronounced /ˈtaɪm daɪˌleɪ.ʃən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “The clock runs slower”
- “time slows down”
- “warping of time”
Learning
Memory Aids
Mnemonic
Imagine two clocks: one on a speeding spaceship, one on Earth. The fast clock ‘dilates’ – stretches – time between its ticks.
Conceptual Metaphor
TIME IS A FLEXIBLE FABRIC (stretched/slowed by speed/gravity).
Practice
Quiz
Time dilation is a consequence of: