Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: fluctuare, from fluere; FLUENT

fluctuate

verb
     
fluc‧tu‧ate [intransitive]
if a price or amount fluctuates, it keeps changing and becoming higher and lower [= vary]
fluctuate between
Prices were volatile, fluctuating between $20 and $40.
fluctuate around
The number of children in the school fluctuates around 100.
Insect populations fluctuate wildly from year to year.

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