variability

variability — noun

1. the degree to which something is likely to change or differ across different sit

1.nounB2
Definition

the degree to which something is likely to change or differ across different situations or over time

Example

Scientists at the weather station recorded high variability in temperatures across the region last winter.

collocation: high variability / low variability

The variability of oil prices made it hard for Otis to plan his company's yearly budget.

variability + of + [cause] — causal pattern

Common collocations
  • high / low variability
  • great / considerable / wide variability
  • variability in / of / among / across / within
  • show / exhibit / display variability
  • reduce / increase variability
  • degree / level / range of variability
Synonyms
  • changeability

    less formal, more common in everyday speech

  • fluctuation

    narrower — refers specifically to repeated up-and-down movement, not general tendency to differ

  • volatility

    stronger connotation of sudden, large, and risky change; often used for prices or emotions

  • inconsistency

    negative connotation — suggests unreliability or lack of dependability

Antonyms
  • consistency

    opposite meaning — lack of change or variation

  • stability

    suggests a steady, unchanging state

  • uniformity

    emphasises sameness across different instances rather than over time

Grammar Patterns

variability + of + noun phrase

variability + in + noun phrase

Usage Note

Uncountable noun — does not take a plural form. Most common in academic and scientific writing, typically paired with 'of' to indicate what changes and 'in' to specify the context.

Common Mistakes

There are many variabilities in the data.
There is a lot of variability in the data.
variability is an uncountable noun and should not be used in the plural form.
The variation of the weather makes planning difficult.' (when meaning variability).
The variability of the weather makes planning difficult.
variation refers to a specific difference or change; variability refers to the general tendency or capacity to change.

Word family

Synonym discussion

Sense: noun/1

All five words relate to things that are not fixed, but they differ in scope and connotation. Changeability is the broadest and most everyday term — it simply means something can change, with no judgement attached. Fluctuation is narrower: it describes repeated, often rhythmic ups and downs, such as stock prices or temperatures. Variation can refer either to a single difference between two things or to the spread within a group (e.g. genetic variation), making it more concrete than variability. Volatility carries a strong implication of risk and unpredictability — a volatile market can swing dramatically. Inconsistency is the only one with an inherently negative flavour, suggesting unreliability (inconsistent work quality). For general statements about how much something tends to differ, use variability ('The variability in his blood pressure concerned the doctor'); for a concrete example of difference, use variation ('There was a 3°C variation between morning and evening readings').

changeabilityfluctuationvariation ↗volatility ↗inconsistency

Common collocations

Nouns

Phrases

  • degree of variability
  • level of variability
  • range of variability
  • source of variability

Prepositions

Etymology

LatinFrenchEnglish

Derived from Latin 'variabilis' (changeable, from 'variare' meaning to change or to differ) combined with the English suffix '-ity', which forms abstract nouns expressing a quality or condition. The word entered English via French 'variabilité' during the 17th century, initially in scientific and philosophical writing before broadening into general use.