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Definition of fluctuate verb from the Oxford Advanced American Dictionary

  

fluctuate

 verb
verb
NAmE//ˈflʌktʃuˌeɪt//
 
[intransitive]Verb Forms present simple I / you / we / they fluctuate
 
he / she / it fluctuates
 
past simple fluctuated
 
-ing form fluctuating
 
 
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to change frequently in size, amount, quality, etc., especially from one extreme to another synonym vary fluctuating prices The documentary follows the fluctuating fortunes of one marketing company. fluctuate between A and B During the crisis, oil prices fluctuated between $40 and $80 a barrel. + adv./prep. Temperatures can fluctuate by as much as 10 degrees. My weight fluctuated wildly depending on how much I ate. My mood seems to fluctuate from day to day. The rate of inflation has been fluctuating around 4% for some time.
 fluctuation
 
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NAmE//ˌflʌktʃuˈeɪʃn//
 
noun [countable, uncountable] fluctuation (in/of something) wild fluctuations in interest ratesSee fluctuate in the Oxford Advanced Learner's Dictionary
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