To move unsteadily back and forth or to sway. The flag wavered in the strong wind.
To be undecided between two opinions or courses of action. She wavered between accepting the job offer and staying at her current position.
To become unsteady or unreliable. His confidence began to waver as the deadline approached.
Of a light, voice, etc.: to flicker, quiver or vary faintly. Her voice wavered as she began to speak.