expand
B2Neutral to formal; common in business, academic, and technical contexts.
Definition
Meaning
To increase in size, volume, quantity, or scope; to become or make something larger or more extensive.
To become more open, detailed, or elaborate in expression or discussion; to develop or spread into new areas, such as business markets or intellectual concepts; to write out an expression in full form from a contracted state.
Linguistics
Semantic Notes
Implies growth or unfolding from within, often in a natural or logical progression. Can be both transitive and intransitive. In mathematics, it has a specific technical meaning.
Dialectal Variation
British vs American Usage
Differences
No significant differences in core meaning or usage. Spelling and grammatical patterns are identical.
Connotations
Identical connotations of growth, development, and increase in scope.
Frequency
Equally common and used in identical registers in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
expand (intransitive)expand something (transitive)expand into somethingexpand on/upon somethingVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “expand one's horizons”
- “expand on/upon a point”
Usage
Context Usage
Business
To increase the scale of operations, enter new markets, or grow the company. E.g., 'The firm plans to expand into Asia next quarter.'
Academic
To elaborate on a theory, argument, or dataset. E.g., 'The researcher was asked to expand her methodology in the final chapter.'
Everyday
To make a space seem larger or to talk about something in more detail. E.g., 'We knocked down a wall to expand the kitchen.'
Technical
In mathematics and computing, to write an expression in its extended form. E.g., 'Expand the algebraic expression (x+2)^2.'
Examples
By Part of Speech
verb
British English
- The company will expand its Leeds office next year.
- Could you expand on that point, please?
- Metals expand when heated.
American English
- The company will expand its Seattle office next year.
- Can you expand on that point, please?
- Gases expand to fill their container.
adverb
British English
- N/A (No standard adverb form 'expand')
American English
- N/A (No standard adverb form 'expand')
adjective
British English
- N/A (No standard adjective form 'expand')
American English
- N/A (No standard adjective form 'expand')
Examples
By CEFR Level
- The balloon will expand if you blow air into it.
- Our garden is small, but we want to expand it.
- The business is doing well and plans to expand next year.
- He refused to expand on his earlier comments to the press.
- The software company is expanding into the educational market.
- The professor asked me to expand my essay with more examples.
- The theory has been expanded upon by numerous scholars since its initial publication.
- To solve the equation, you must first expand the polynomial.
Learning
Memory Aids
Mnemonic
Imagine a SPONGE (sounds like 'span' in 'expand') that soaks up water and gets bigger—it EXPANDS.
Conceptual Metaphor
IDEAS ARE PLANTS (they grow and expand); BUSINESS IS A LIVING ORGANISM (it grows and expands).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не путать с 'расширять(ся)' только в физическом смысле. 'Expand' также означает 'развивать мысль', 'расшифровывать формулу'.
- В математике 'expand' — 'раскрыть скобки', а не просто 'увеличить'.
- Не всегда эквивалентно 'расширяться', иногда ближе к 'разворачивать' (аргумент).
Common Mistakes
- Incorrect preposition: 'expand in' instead of 'expand into' (for markets).
- Using as a transitive verb where intransitive is needed: 'The company expanded it's operations' (correct: 'expanded its operations' or 'expanded').
- Confusing with 'extend' (which often implies lengthening or prolonging).
Practice
Quiz
In a mathematical context, what does it mean to 'expand' an expression?
FAQ
Frequently Asked Questions
'Expand' typically implies growth in all directions or an increase in scope, volume, or detail. 'Extend' usually implies making something longer in space or time (e.g., extend a road, extend a deadline).
Yes, the primary adjective form is the past participle 'expanded' (e.g., an expanded edition). The related adjective 'expansive' exists but means 'covering a large area' or 'talkative and friendly'.
Yes, it can be intransitive. E.g., 'The universe is expanding.' or 'Our business is expanding.'
It is a phrasal verb meaning to give more details about something or to elaborate on a topic or idea.