Longman Dictionary of Contemporary English
Wiktionary
n. 1 (block capital English) 2 text written entirely in capital letters.
Usage examples of "block capitals".
When he printed her name in block capitals on the envelope it looked strange to him, and the next time he saw her he raised the subject.
I don't hold out much hope for the envelope-standard brown paper sold in thousands of outlets, normal stamps, address in block capitals written with felt-tip pen, and already handled by a score of anonymous people.
SORRY YOU WERE NOT IN WHEN I CALLED BACK, It said, in block capitals.
On the square of paper had been written in large block capitals in black ink: THE DIARY OF SALOMON TAUBER.
Perched on a high stump I began with NEITHER WISE NOR GOOD, which I printed out in fair block capitals at the page-top.
The message was written in block capitals, in purple copying-pencil.
Behind the right hand lower corner of the windshield there was a white card printed in block capitals.
Rydell had hand-printed his fax with a medium-width fiber-pen in scrupulously neat block capitals.
It had Boeing markings, and simple instructions marked in big block capitals.
The only inscription was his name, Christian Rosenberg, in heavy black block capitals.