People as well as things may repeat, so repeater has multiple meanings according to various contexts:

• In telecommunications, a repeater relays a signal after amplifying it.
• In criminology, a "repeater" is a criminal who is repeatedly convicted of the same crimes (a repeat offender).
• In watchmaking, a repeater or repeating watch, invented by Daniel Quare about 1680, is a chiming watch that will repeat the most recent hour when the stem is pressed, a boon in the darkness of night when a light was not easily available.
• An album by the post-hardcore band Fugazi, is titled Repeater.
• A small hand drum used in the nyabinghi music of the Rastafari movement.

See also: repeating rifle