An open letter is a letter that is published in a newspaper or magazine. It is addressed to a particular person but is intended for the general reader, usually in order to protest or give an opinion about something.
The Lithuanian parliament also sent an open letter to the United Nations.
open letter in British English
noun
a letter, esp one of protest, addressed to a person but also made public, as through the press
open letter in American English
a letter written as to a specific person, often in attack, criticism, etc., but published in a newspaper or magazine for everyone to read
In other languages
open letter
British English: open letter NOUN
An open letter is a letter that is published in a newspaper or magazine, which usually protests or gives an opinion about something.
The parliament also sent an open letter to the United Nations.