repeater

One who or that which repeats.
A student repeating a course, class, or grade.
A patient who repeatedly presents with the same symptoms.
A consumer who repeatedly purchases the same goods or services.
(US) One who votes more than once at an election.
A person who regularly sees unexplained sightings of paranormal phenomena.
(dated) A gun that has a store of cartridges and does not need reloading after each shot.
A telegraphic instrument for automatically retransmitting a message.
An electronic device that receives a weak or low-level signal and retransmits it at a higher level or higher power.
A watch with a striking apparatus which, upon pressure of a spring, will indicate the time, usually in hours and quarters.
A frigate appointed to attend an admiral in a fleet, and to repeat the admiral's signals.
A pennant used to indicate that a certain flag in a hoist of signal is duplicated.
A repeating decimal.
In calico printing, a design repeated at equal intervals in a pattern.