# fob

/ˈfɔb/ (US) · /fˈɒb/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/fob
Updated: 2026-05-31

## Definition

a small electronic device you use to open a car door or get into a building. It is also a short name for a key ring or a decorative item on a chain.

For teachers: a small electronic device used for remote keyless entry or authentication; also refers to a decorative ornament attached to a watch chain or key ring.

## Examples

- I pressed the button on my key fob to unlock the car.
- Employees must tap their security fob against the reader to gain access to the laboratory after hours.
- The antique pocket watch was accompanied by a heavy gold fob, a family heirloom that had been passed down through four generations of watchmakers.

## Usage notes

- Commonly used in modern contexts to refer to electronic access tokens.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.