Definition of fluctuate in English:



  • Rise and fall irregularly in number or amount.

    ‘trade with other countries tends to fluctuate from year to year’
    ‘a fluctuating level of demand’
    • ‘The amount of soap required by MCC fluctuates with the demand.’
    • ‘Union membership has fluctuated as different industries rise and decline, governments and generations change.’
    • ‘They stare into an infinite chasm that opens up in the face of using a limited amount of notes that fluctuate from serene moments to bawling noise storms.’
    • ‘This means that the absolute amount of re-synthesized sucrose fluctuates considerably with fruit age, by as much as a factor of 3.’
    • ‘Prices then rose to £25 in the 1730s, and fluctuated about that level into the 1790s.’
    • ‘Jobs in industry have fluctuated with the level of the pound.’
    • ‘However, experts confirmed that levels of this protein fluctuated naturally.’
    • ‘Avoid alcohol because it can cause your blood sugar levels to fluctuate and induces irritability.’
    • ‘The original volume levels fluctuate, particularly when the single takes are employed.’
    • ‘As the general price level fluctuates, the dollar is bound to become a unit of different magnitude.’
    • ‘Mood gently fluctuates as the light levels change, complemented by the rhythm of the mist continually settling and rising.’
    • ‘Volume levels fluctuate wildly, leading to constant struggles with the remote.’
    • ‘Moods and emotions are varied and fluctuating as you deal with adversaries and rally around friends.’
    • ‘He requires large doses of narcotics for pain control and his level of consciousness fluctuates greatly.’
    • ‘Symptoms seem to vary from year to year, and crop levels fluctuate.’
    • ‘It also shows a person's ability to govern and fluctuate between rising and falling.’
    • ‘The amount owed each month fluctuated with holidays, missed lessons and book expenses.’
    • ‘Thoreau discovered that the level of the pond fluctuates by about five feet over a period of 25 years.’
    • ‘Bond funds also pay income, usually on a monthly basis, but the amount you receive can fluctuate.’
    • ‘Oxygen levels have fluctuated since the air became oxygen rich, but not by much.’
    vary, differ, shift, change, alter, waver, swing, oscillate, alternate, rise and fall, go up and down, see-saw, yo-yo, be unstable, be unsteady
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Mid 17th century (earlier ( late Middle English) as fluctuation): from Latin fluctuat- ‘undulated’, from the verb fluctuare, from fluctus ‘flow, current, wave’, from fluere ‘to flow’.