variable
C1Formal to technical, also common in academic and scientific contexts.
Definition
Meaning
Something that is not fixed or constant; liable to change.
In mathematics and computing, a quantity that can assume any of a set of values. More generally, something liable to variation in quality or nature.
Linguistics
Semantic Notes
The adjective can describe both the nature of a subject (variable weather) and the subject itself (x is a variable). As a noun, it is a key term in algebra, programming, and scientific research.
Dialectal Variation
British vs American Usage
Differences
Minimal. Both use the word identically in technical fields. 'Variable' as a noun for a 'variable wind' in sailing/meteorology is slightly more common in UK texts.
Connotations
Identical. The word carries strong scientific/mathematical associations in both dialects.
Frequency
Slightly more frequent in American English in computing contexts due to tech sector dominance, but the difference is negligible.
Vocabulary
Collocations
Grammar
Valency Patterns
be + ADV + variable (The quality is highly variable)variable + in + NOUN (variable in size)a variable of + NOUN PHRASE (a variable of interest)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “The only constant is change (and variable). (Paraphrase of Heraclitus, relevant to the concept).”
Usage
Context Usage
Business
Refers to costs that change with output (variable costs), or factors affecting a business plan.
Academic
A fundamental concept in research: a factor, trait, or condition that can exist in differing amounts or types.
Everyday
Used to describe changeable things like weather, moods, or performance.
Technical
In programming, a named storage location. In maths, a symbol for an unknown quantity.
Examples
By Part of Speech
verb
British English
- The system is designed to variable the output automatically. (Rare/technical verb use, often 'to vary' is preferred).
American English
- In this model, we can variable the parameters. (Rare/technical).
adverb
British English
- (Not standard. Use 'variably'). The soil quality varied variably across the field.
American English
- (Not standard. Use 'variably'). The data points were variably distributed.
adjective
British English
- The British weather is notoriously variable, with sunshine one minute and rain the next.
- The experiment failed due to variable atmospheric pressure.
American English
- We offer a mortgage with a variable interest rate.
- His performance has been highly variable this season.
Examples
By CEFR Level
- The weather is very variable in spring.
- The test results were variable, so we need to run it again.
- In the equation 'y = x + 2', 'x' is a variable.
- The success of the project depends on too many unpredictable variables.
- We analysed the relationship between the independent variable (dose) and the dependent variable (response).
- The researcher controlled for confounding variables to ensure the validity of the study.
- The algorithm's efficiency is variable depending on the initial input parameters.
Learning
Memory Aids
Mnemonic
Think of 'vary-able' – something that is ABLE to VARY.
Conceptual Metaphor
A CONTAINER FOR A VALUE (in computing/maths). A WEATHER VANE (for changeability).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'разнообразный' (various/diverse). 'Variable' is about change in one thing, not variety among many. 'Переменная' is the correct mathematical/programming equivalent.
Common Mistakes
- Using 'variable' to mean 'various' (e.g., 'We offer variable services' – incorrect; use 'various'). Confusing 'variable' (adj/noun) with 'variance' (noun) or 'varied' (adj).
Practice
Quiz
In the context of programming, what is a 'variable'?
FAQ
Frequently Asked Questions
'Variable' describes something that changes or can change. 'Varied' describes something that consists of different types or has been changed. E.g., 'variable speeds' (speeds that change), 'varied speeds' (many different speeds).
It is commonly used as both a noun (e.g., 'a key variable in the study') and an adjective (e.g., 'variable winds').
In an experiment, the independent variable is the one you change or control to test its effects. The dependent variable is what you measure; it 'depends' on the independent variable.
Usually, it is neutral or slightly negative (implying unpredictability). In technical contexts, it is purely neutral. In some cases, 'variable' can be positive if flexibility is desired (e.g., 'variable working hours').
Collections
Part of a collection
Science and Research
B2 · 43 words · Academic and scientific research methodology.
Scientific Terminology
C1 · 44 words · Precise vocabulary used in scientific disciplines.
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