French phrase
Cher Monsieur ~.
Meaning
Dear Mr. ___.
When to use it
A polite salutation for a male addressee. It opens formal letters or emails, often with a name or title.
Example dialogue
Cher Monsieur Dupont.
Dear Mr. Dupont.
Merci, je l'envoie tout de suite.
Thank you, I will send it right away.