[verb] [I] - to change or vary, esp. continuously and between one level or thing and anotherVegetable prices fluctuate according to the season.Her wages fluctuate between £150 and £200 a week.I fluctuate between feeling really happy and utterly miserable.Her weight fluctuates wildly.
FLUCTUATE
Meaning of FLUCTUATE in English
Cambridge English vocab. Кембриджский английский словарь. 2012