A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances.

Device that regenerates network signals.

A passive repeater or passive radio link deflection, is a reflective or sometimes refractive panel or other object that assists in closing a radio or microwave link, in places where an obstacle in the signal path blocks any direct, line of sight communication.

A wireless repeater (also called wireless range extender or wifi extender) is a device that takes an existing signal from a wireless router or wireless access point and rebroadcasts it to create a second network.

a device, in a watch, in which the current time is announced by means of a combination of sounds that represent the hour, quarter hour, and minute; usually activated by a button

A soft gamma repeater is an astronomical object which emits large bursts of gamma-rays and X-rays at irregular intervals.

a type of repeating firearm that was designed by members of the Kalthoff family around 1630, and became the first repeating firearm to be brought into military service.