Pronunciation: (vas'u-lāt"), [key]
—v.i., -lat•ed, -lat•ing.
1. to waver in mind or opinion; be indecisive or irresolute: His tendency to vacillate makes him a poor leader.
2. to sway unsteadily; waver; totter; stagger.
3. to oscillate or fluctuate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.