blue box

American  

noun

1. an electronic device used by phone phreaks to send out signals that unlock long-distance telephone circuits.

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blue box British  

noun

1. a blue plastic container for domestic refuse that is to be collected and recycled

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Etymology

Origin of blue box

First recorded in 1975–80

Example Sentences

The blue box joins a growing list of deterrents deployed by Southern California business owners and property managers who have taken matters into their own hands to address the homeless crisis.

From Los Angeles Times • May 29, 2025

Cantrell expected to find magazines in the blue box.

From Seattle Times • Aug. 11, 2023

If you have to use a blue box, drop in the check before the day’s last scheduled pickup so it doesn’t sit in the box overnight.

From New York Times • Mar. 10, 2023

People at the library quickly recognized the blue box that the notebooks had been stored in.

From NewsForKids.net • Apr. 7, 2022

“Got it,” she said as she carefully pulled down a pale blue box, its color faded with age.

From "City Spies" by James Ponti