vibration

noun

1. the action of vibrating; specif.,
   1. movement back and forth, as of a pendulum; oscillation
   2. rapid rhythmic movement back and forth; quiver
2. vacillation or wavering, as between two choices or opinions
3. ☆ emotional qualities or supernatural emanations that are sensed or felt by another person or thing
4. Physics
   1. periodic, to-and-fro motion or oscillation of an object, as an elastic body or the particles of a fluid, when it is displaced from the rest position or position of equilibrium, as in transmitting sound
   2. a single, complete oscillation