D defs.my
Entry 2 senses Webster, 1913

Interrupter

· In·ter·rupt·er · IPA
01 n. One who, or that which, interrupts.
  1. 1.
    One who, or that which, interrupts.
  2. 2.
    A device for opening and closing an electrical circuit; a vibrating spring or tuning fork, arranged to make and break a circuit at rapidly recurring intervals, by the action of the current itself.(Elec.)