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.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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