Definitions

1. verb

to waver or fluctuate in opinion, intention, or course of action

“She vacillated on whether to accept the job offer or continue her education.”

2. noun

the act of waver or fluctuation

“Her vacillation caused her to miss the deadline.”

3. verb (transitive)

to cause to waver or fluctuate

“The uncertainty of the situation caused him to vacillate his decision.”