vibrator

noun

1. a person or thing that vibrates.
2. any of various machines or devices causing a vibratory motion or action.
3. a small appliance of variable shape, made to oscillate very rapidly and used in vibratory massage.
4. Electricity.
   1. a device in which, by continually repeated impulses, a steady current is changed into an oscillating current.
   2. a device for producing electric oscillations.

noun

1. 1. a device for producing a vibratory motion, such as one used in massage or in the distribution of wet concrete in moulds
   2. such a device with a vibrating part or tip, used as a dildo
2. a device in which a vibrating conductor interrupts a circuit to produce a pulsating current from a steady current, usually so that the current can then be amplified or the voltage transformedSee also chopper (def. 6)