Vibrate, v. i.
1. To move to and fro, or from side to side, as a pendulum, an elastic rod, or a stretched string, when disturbed from its position of rest; to swing; to oscillate.
2. To have the constituent particles move to and fro, with alternate compression and dilation of parts, as the air, or any elastic body; to quiver.
3. To produce an oscillating or quivering effect of sound; as, a whisper vibrates on the ear. Pope.
4. To pass from one state to another; to waver; to fluctuate; as, a man vibrates between two opinions.
1 other Webster entry under this spelling
Vibrate, v. t. [imp. & p. p. Vibrate; p. pr. & vb. n. Vibrating.]
1. To brandish; to move to and fro; to swing; as, to vibrate a sword or a staff.
2. To mark or measure by moving to and fro; as, a pendulum vibrating seconds.
3. To affect with vibratory motion; to set in vibration. Breath vocalized, that is, vibrated or undulated, may . . . impress a swift, tremulous motion. Holder. Star to star vibrates light. Tennyson.