C2to change, especially continuously and between one level or thing and another: Vegetable prices fluctuate according to the season.Her wages fluctuate between £150 and £200 a week.Her weight fluctuates wildly.fluctuating pricesChangingAdapting and modifying Adapting and attuning to somethingChanging frequentlyfluctuation
/ˌflʌk.tjuˈeɪ.ʃən/noun[C or U]›fluctuations in share prices/the exchange rate/temperatureChange and changes