a person or thing that repeats.
Horology. a timepiece, especially a watch, that may be made to strike the hour or part of the hour. Compare clock watch.
Education. a pupil who repeats a course or group of courses that he or she has failed.
a person who votes illegally by casting more than one vote in the same election.
a person who has been convicted and sentenced for one crime, and later for another; recidivist.
Mathematics. (no longer in technical use) a repeating decimal.
Telecommunications. a device capable of receiving one-way or two-way communications signals and delivering corresponding signals that are either amplified, reshaped, or both.
Navigation, gyro repeater.

1570–80; repeat + -er1

nonrepeater, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
repeater (rɪˈpiːtə)
1.  a person or thing that repeats
2.  Also called: repeating firearm a firearm capable of discharging several shots without reloading
3.  a timepiece having a mechanism enabling it to strike the hour or quarter-hour just past, when a spring is pressed
4.  electrical engineering a device that amplifies or augments incoming electrical signals and retransmits them, thus compensating for transmission losses
5.  nautical Also called: substitute one of three signal flags hoisted with others to indicate that one of the top three is to be repeated

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Computing Dictionary

repeater definition

networking, communications
A network or communications device which propagates electrical signals from one cable to another, amplifying them to restore them to full strength in the process. Repeaters are used to counter the attenuation which occurs when signals travel long distances (e.g. across an ocean).
A network repeater is less intelligent than a bridge, gateway or router since it works at the physical layer.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Each smart meter is a transmitter and receiver and repeater for the other meter signals.
There it will stay hidden in the scrub to serve as a radio repeater for the signal from the tiny bug left inside.
Images for repeater
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