Definition of "Repeater" :
noun: (electronics) electronic device that amplifies a signal before transmitting it again
"Repeaters can be used in computer networks to extend cabling distances."
noun: a firearm that can fire several rounds without reloading
noun: someone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior)
noun: a person who repeats
"The audience consisted largely of repeaters who had seen the movie many times."