strongbox

American  

[strawng-boks, strong-] / ˈstrɔŋˌbɒks, ˈstrɒŋ- /

noun

1. a strongly made, lockable box or chest for safeguarding valuable possessions, as money, jewels, or documents.

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strongbox British  

/ ˈstrɒŋˌbɒks /

noun

1. a specially designed box or safe in which valuables are locked for safety

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Etymology

Origin of strongbox

First recorded in 1675–85; strong + box ¹

Example Sentences

The jewel of the program was the Parthenon, which was part temple to Athena and part strongbox for the tribute that flowed to Athens.

From The Wall Street Journal • Apr. 10, 2026

By swiping from left to right, users can switch to a "strongbox" environment offering secure applications, many developed by fellow Swiss firm Proton.

From Barron's • Mar. 4, 2026

The outlet shared Damore saw a metal strongbox later that evening under his father’s bed.

From Fox News • Jul. 20, 2020

Or where a car understood to symbolize classic American muscle cannot break free of the blank strongbox in which it is imprisoned.

From Salon • Jun. 27, 2018

Little Willy showed Mr. Foster the papers from Grandfather’s strongbox and told him everything Clifford Snyder, the tax man, had said.

From "Stone Fox" by John Reynolds Gardiner