Meaning of “vacillate” in the English Dictionary

"vacillate" in British English

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vacillateverb [ I ]

uk /ˈvæs.ɪ.leɪt/ us /ˈvæs.ə.leɪt/ disapproving

to be uncertain what to do, or to change often between two opinions:

Her mood vacillated between hope and despair.
noun [ C or U ] uk /ˌvæs.ɪˈleɪ.ʃən/ us /ˌvæs.əˈleɪ.ʃən/

(Definition of “vacillate” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"vacillate" in American English

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vacillateverb [ I ]

us /ˈvæs·əˌleɪt/

to be unable to decide something and esp. to continue to change opinions:

The president continues to vacillate over foreign policy.

(Definition of “vacillate” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"vacillate" in Business English

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vacillateverb [ I ]

uk /ˈvæsɪleɪt/ us

FINANCE if prices, rates, etc. vacillate, they keep rising and falling by small amounts:

After weeks of vacillating around $75 per barrel, the price of crude closed at $85 barrel.

to be uncertain about what to do or to keep changing your opinion about something:

vacillate between sth (and sth) The election result was in the hands of voters vacillating between two parties.

(Definition of “vacillate” from the Cambridge Business English Dictionary © Cambridge University Press)