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

Eventually the company built a Bluetooth earpiece that felt like “pure magic,” said founder Tanay Kothari.

From The Wall Street Journal • May 10, 2026

Its TM-B e-bike is decked out with features, including Bluetooth, GPS, Wi-Fi, a built-in touchscreen, and software that supports over-the-air updates.

From Los Angeles Times • May 1, 2026

Meanwhile, your phone continuously senses and records your communications, info about your health, what apps you’re using, and tracks your location via cell towers, GPS satellites and Wi-Fi and Bluetooth.

From Salon • Apr. 23, 2026

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

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