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fluctuation
/ˌflʌktʃuˈeɪʃən/
irregular variation
The stock market experienced significant fluctuations throughout the day.
The stock market showed large, irregular ups and downs during trading hours.
Finance
formal
A change or variation in level, amount, or value, especially one that is irregular or unpredictable.
Currency fluctuations can impact international trade costs.
Changes in exchange rates can increase or decrease the expenses of global commerce.
The report analyzed temperature fluctuations over the past decade.
Researchers examined the irregular changes in temperature recorded over ten years.
Often used in contexts involving data, markets, or natural phenomena where stability is expected.
technical
A rise and fall in the level or amount of something.
The standard deviation measures the degree of fluctuation in a dataset.
Standard deviation quantifies how much values in a dataset deviate from the average.
In statistics, fluctuation refers to the spread or dispersion of data points around a central value.
Collocations
price fluctuationchanges in the cost of goods or servicesseasonal fluctuationregular variations tied to time of yearfluctuation rangethe span between highest and lowest values
Pro Tip
Use with precise contexts
Pair 'fluctuation' with specific domains (e.g., 'market fluctuation,' 'hormonal fluctuation') to clarify meaning. Avoid vague phrases like 'fluctuation of life' unless metaphorical.
Gold Rule
Avoid redundancy
Do not pair 'fluctuation' with 'up and down'—the word itself implies irregular movement. Instead, say 'significant fluctuations' to emphasize magnitude.
Word Origin
From Latin *fluctuātiōn-*, stem of *fluctuāre* ('to fluctuate'), from *fluctus* ('wave, billow'), derived from *fluere* ('to flow'). The sense of irregular movement entered English in the 17th century.
Usage Notes
Prefer 'fluctuation' for irregular or unpredictable changes; use 'variation' for more general differences. In finance, it often implies short-term changes rather than long-term trends.
Word Breakdown
fluct-
to flow or wave
root-u-
connecting vowel
infix-ation
action or process
suffixEnglish Dictionary