Bluetooth

American  

[bloo-tooth] / ˈbluˌtuθ /

noun

Computers, Trademark.

1. a brand name for a wireless networking technology that uses short-wave radio frequencies to interconnect cell phones, portable computers, and other wireless electronic devices.

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Bluetooth British  

/ ˈbluːˌtuːθ /

noun

1. a short-range radio technology that allows wireless communication between a computer and a keyboard, between mobile phones, etc

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Etymology

Origin of Bluetooth

C20: after the 10th-century Danish King Harald Blatand (Harold Bluetooth), instrumental in uniting warring factions in Scandinavia

Example Sentences

Investigators are now using a device that might be able to detect Bluetooth signals coming from her pacemaker, law enforcement sources told CBS.

From BBC • Feb. 18, 2026

The NUP says it has a vote-monitoring app that can overcome this issue by using Bluetooth technology.

From BBC • Jan. 9, 2026

You need a compatible Apple Watch and an Apple Intelligence-enabled iPhone nearby, plus AirPods or other Bluetooth headphones to hear the coaching.

From The Wall Street Journal • Jan. 4, 2026

James Bale and Chenny Wang, who are overweight on the location-app provider, tell clients in a note that cheaper Bluetooth tracking devices are prone to performance issues.

From The Wall Street Journal • Oct. 28, 2025

She wore an expensive, custom-tailored business suit, jazzy high-heeled shoes, a Bluetooth earpiece, and glasses with thick red frames.

From "Escape from Mr. Lemoncello's Library" by Chris Grabenstein