# expansion

/ɪkˈspænʃən/ (US) · /ɛkspˈænʃən/ (UK)

Source: https://englishreference.com/word/expansion
Updated: 2026-06-19

## Senses

### 1. growth in size or scope

noun · CEFR B2

the act of becoming bigger or covering more area.

For teachers: the action of becoming larger or more extensive in physical size or conceptual scope.

- The rapid expansion of the city has led to more traffic on the roads.
- The rapid expansion of urban areas often outpaces the development of necessary infrastructure, leading to significant logistical challenges for local governments.

### 2. business or economic growth

noun · CEFR B2

when a company or an economy grows and becomes more successful.

For teachers: a period of economic growth or the process of a business increasing its market presence and operations.

- The company is planning an expansion into the European market next year.
- Economists predicted a period of sustained expansion following the implementation of the new trade agreement and the reduction of interest rates.

### 3. physical increase in volume

noun · CEFR C1 · Technical

the increase in the volume of a substance, often caused by heat.

For teachers: the increase in volume of a substance, typically resulting from a change in temperature or pressure.

- The expansion of the metal in the heat caused the door to get stuck.
- Engineers must account for the thermal expansion of steel beams when designing bridges to prevent structural failure during extreme summer temperatures.

### 4. added content or detail

noun · CEFR B2

a new part added to something, like a game or a book, to make it longer or more complete.

For teachers: the addition of further detail to a narrative or the release of supplementary content for an existing software product or game.

- I bought the new expansion for my favourite board game yesterday.
- The studio released a digital expansion that introduced three new playable regions and a revamped combat system to the original title.

### 5. spelling out an abbreviation

noun · CEFR C1 · Academic

the full version of a word that has been shortened.

For teachers: the full, unabbreviated form of a word or phrase represented by an acronym or initialism.

- The expansion of 'NASA' is the National Aeronautics and Space Administration.
- The author provided the full expansion of every technical acronym in the appendix to ensure the text remained accessible to non-specialist readers.

## Examples

- The company is planning an expansion into new markets.
- Rapid economic expansion often leads to higher employment rates but can also cause prices to rise quickly.
- The sudden expansion of the tech sector created a vacuum in the labor market, forcing traditional firms to increase their benefits packages to retain talent.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.