attaché case

American  

noun

1. a flat, usually rigid, rectangular briefcase for carrying business papers, documents, or the like.

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attaché case British  

noun

1. a small flat rectangular briefcase used for carrying documents, papers, etc

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Etymology

Origin of attaché case

First recorded in 1900–05

Example Sentences

One could not leave the building without a thorough search of anything you were carrying: book, box, bag, magazine, folder, briefcase or attaché case, whatever.

From Washington Post • Jan. 16, 2023

“I did as I was asked,” Billig recalled by email this week, “and Mr. Merrick put the music in his attaché case and departed for New York.”

From New York Times • Nov. 4, 2020

In his hand was a black attaché case.

From Salon • Sep. 7, 2020

But luckily, my attaché case didn’t last long.

From Slate • Aug. 20, 2020

I went to my room, grabbed the attaché case, checked it over quickly—never trust another man to check your vac suit for you—and headed for the surface.

From A Spaceship Named McGuire by Garrett, Randall