repeater

noun

1. One who or that which repeats.
2. A student repeating a course, class, or grade.
3. A patient who repeatedly presents with the same symptoms.
4. A consumer who repeatedly purchases the same goods or services.
5. (US)One who votes more than once at an election.

   “The pimps and the panders, the cadets and maquereaux… they vote the ticket of the organization; they contribute to the campaign funds; they serve as colonizers and repeaters at the polls.”

6. A person who regularly sees unexplained sightings of paranormal phenomena.
7. (dated)A gun that has a store of cartridges and does not need reloading after each shot.
8. A telegraphic instrument for automatically retransmitting a message.
9. An electronic device that receives a weak or low-level signal and retransmits it at a higher level or higher power.

   “[…] Colonel Moen was trying to make sense of the radio nets, which had never really been operational let alone secure; our numerous outposts were cobbled together with hand-held Motorolas and too few repeater stations […]”

10. A watch with a striking apparatus which, upon pressure of a spring, will indicate the time, usually in hours and quarters.
11. A frigate appointed to attend an admiral in a fleet, and to repeat the admiral's signals.
12. A pennant used to indicate that a certain flag in a hoist of signal is duplicated.
13. A repeating decimal.
14. In calico printing, a design repeated at equal intervals in a pattern.