expansion
gb/ɪkspˈænʃən/ us/ɪkspˈænʃən/
B1
English
~ 2400
Senses
0 senses
Noun
B1
event
1
process of becoming larger
When something becomes bigger or covers more space.
Usage pattern:
the expansion of [something]
Common mistake:
Learners sometimes confuse 'expansion' with 'explosion'. 'Explosion' is sudden and violent; 'expansion' is gradual or planned.
Synonyms
growth (Often used for natural or economic increases; may not imply deliberate action.)
Antonyms
contraction (Refers to becoming smaller or less extensive, opposite of expansion.)
Collocations
rapid expansion
|economic expansion
|global expansion
|territorial expansion
|business expansion
Themes
business
|science
|geography
|core_vocabulary
Examples
- The company plans a major expansion into Asian markets.
- Urban expansion is affecting local wildlife habitats.
- The expansion of the airport will take two years to complete.
- Economic expansion has led to job creation.
- The rapid expansion of the internet changed communication forever.
Learner examples
- The city is seeing fast expansion.
- The store is planning an expansion next year.
- The expansion of the road will help traffic.
- We saw the expansion of the farm.
- Expansion of the school will give more space.
Noun
technical
B2
event
2
increase in volume from heat/pressure
When something takes up more space because it is heated or pressure changes.
Common mistake:
Some learners confuse 'expansion' with 'extension'; 'extension' means making something longer, not necessarily bigger in all directions.
Synonyms
dilation (A technical term often used in physics for increase in volume.)
Antonyms
contraction (In physics, refers to a decrease in volume due to cooling or pressure change.)
Collocations
thermal expansion
|gas expansion
|expansion coefficient
Themes
science
|physics
|engineering
Examples
- Thermal expansion must be considered when designing bridges.
- The expansion of gases occurs when they are heated.
- Metal pipes have joints to allow for expansion and contraction.
- The balloon's expansion was caused by the rising temperature.
Learner examples
- Heat causes the metal's expansion.
- Water shows little expansion when cold.
- The balloon's expansion happened in the sun.
- Thermal expansion can break glass.
Noun
B2
action
3
adding detail or scope to something
When you make something like a story or idea bigger by adding more parts or details.
Common mistake:
Learners may confuse 'expansion' with 'explanation'; explanation is about making something clear, not necessarily bigger in scope.
Synonyms
elaboration (Emphasizes adding detail and complexity rather than size.)
Antonyms
condensation (Making something shorter and simpler by removing detail.)
Collocations
story expansion
|expansion of ideas
|narrative expansion
Themes
communication
|writing
|education
|core_vocabulary
Examples
- The novel is an expansion of a short story she wrote years ago.
- His speech was an expansion on last year's presentation.
- The film is an expansion of the original concept.
Learner examples
- The book is an expansion of his first idea.
- Her talk was an expansion of last week's class.
- They made an expansion of the plan.
Grammar
Dictionary form
expansion
IPA
GB/ɪkspˈænʃən/
US/ɪkspˈænʃən/
Syllables & stress
ex - pan - sion (3 syllables)
Stress on 2nd syllable (pan)
Word forms
Noun
- Base: expansion
- Plural: expansion, expansions
Word family
Forms
expansions
noun
Core family
expand
verb B1
Related words
Negative and opposite forms
contract
verb B1
contraction
noun B1
Advanced or less common
expansively
adverb
expansiveness
noun
Expressions
economic expansion
1/ˌɛkənˈɑmɪk ɪkspˈænʃən/
fixed phrase
period of economic growth
A time when a country's economy grows and more goods and services are produced.
Examples
- During economic expansion, unemployment usually falls.
- The country enjoyed a decade of economic expansion before the crisis.
rapid expansion
1/ɹˈæpɪd ɪkspˈænʃən/
fixed phrase
very fast growth process
When something becomes bigger very quickly.
Examples
- The rapid expansion of technology has changed our lives.
- Rapid expansion can cause problems if not managed well.
territorial expansion
1/tˌɛɹɪtˈɔɹiəl ɪkspˈænʃən/
fixed phrase
increase in controlled land area
When a country or group gets more land under its control.
Examples
- The 19th century saw significant territorial expansion by the empire.
- Territorial expansion often led to conflict.
thermal expansion
1/θˈɚməl ɪkspˈænʃən/
fixed phrase
technical
size increase from heat
When something gets bigger because it is heated.
Examples
- Thermal expansion can cause cracks in concrete.
- Bridges have joints to allow for thermal expansion.