What is "letters to the editor"

Usage examples of "letters to the editor".

Alvah Scarret had to be kept away from the room where hampers of letters to the editor were being filled each day.

He was fond of letters to the editor, especially ones he wrote and signed with a pseudonym.

I prefer to gauge public opinion the regular way: newspaper editorials, letters to the editor, and the mail we get here.

They write letters to the editor telling how they spotted Secretary-General Haruman in a drug store and he looked unhappy.