key fob

[ kee fob ]

Phonetic (Standard)IPA

noun

a programmed, battery-powered device enabling keyless access or entry, especially to a vehicle, usually carried on a key ring or keychain:
The windows and sunroof of your car can also be opened and closed using the key fob.
1. an ornament or other object attached to a key ring or keychain:
  This key fob of tooled leather can hold a small photo.
2. a key ring or keychain with such an ornament on it:
  Has anyone turned in a key fob with a little foam golf ball and three keys on it?

Origin of key fob¹

First recorded in 1910–15

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