1. (noun) a written message addressed to a person or organization

• letter

1. (noun) a written message addressed to a person or organization

• aerogram
• aerogramme
• air letter
• airmail letter
• business letter
• chain letter
• cover letter
• covering letter
• crank letter
• dead letter
• dead mail
• encyclical
• encyclical letter
• epistle
• fan letter
• form letter
• invitation
• letter of intent
• open letter
• pastoral
• personal letter
• round robin

1. (noun) a written message addressed to a person or organization

• document
• text
• textual matter