What is Black letter?

a day on which a great incident of misfortune happened or has happened.

September eleven is a black-letter day in the world history of terrorism.

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Black letter - video

Black letter - what is it?

A break up letter. A short, impolite letter you send to someone to break up with them rather than doing it in person.

She sent me a Black Letter.

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What does "Black letter" mean?

A break up letter. A short, impolite letter you send to someone to break up with them rather than doing it in person.

She sent me a Black Letter.

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