'Vacillate' definitions:

Definition of 'vacillate'

From: WordNet
verb
Be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement" [syn: hover, vibrate, vacillate, oscillate]
verb
Move or sway in a rising and falling or wavelike pattern; "the line on the monitor vacillated" [syn: fluctuate, vacillate, waver]

Definition of 'Vacillate'

From: GCIDE
  • Vacillate \Vac"il*late\ (v[a^]s"[i^]l*l[=a]t), v. i. [imp. & p. p. Vacillated (v[a^]s"[i^]l*l[=a]`t[e^]d); p. pr. & vb. n. Vacillating.] [L. vacillare, vacillatum; cf. Skr. va[~n]c.] [1913 Webster]
  • 1. To move one way and the other; to reel or stagger; to waver. [1913 Webster]
  • [A spheroid] is always liable to shift and vacillatefrom one axis to another. --Paley. [1913 Webster]
  • 2. To fluctuate in mind or opinion; to be unsteady or inconstant; to waver. [1913 Webster]
  • Syn: See Fluctuate. [1913 Webster]