noun Date: 1909 a letter on a subject of frequent recurrence that can be sent to different people without essential change except in the address, a letter for mass circulation that is printed in many copies and has a very general salutation (as Dear Friend )
FORM LETTER
Meaning of FORM LETTER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012