document - anything serving as a representation of a person's thinking by means of symbolic marks

mail - the bags of letters and packages that are transported by the postal service

text, textual matter - the words of something written; "there were more than a thousand words of text"; "they handed out the printed text of the mayor's speech"; "he wants to reconstruct the original text"

correspondence - communication by the exchange of letters

business letter - a letter dealing with business

cover letter, covering letter - a letter sent along with other documents to provide additional information

crank letter - a hostile (usually anonymous) letter

encyclical, encyclical letter - a letter from the pope sent to all Roman Catholic bishops throughout the world

fan letter - a letter that is a piece of fan mail

personal letter - a letter dealing with personal affairs

form letter - a letter that is printed in multiple copies and mailed to a list of recipients

open letter - a letter of protest; addressed to one person but intended for the general public

chain letter - a letter that is sent successively to several people

pastoral - a letter from a pastor to the congregation

round robin - a letter signed by a number of people

aerogram, aerogramme, air letter, airmail letter - a letter sent by air mail

epistle - especially a long, formal letter

dead mail, dead letter - mail that can neither be delivered nor returned

letter of intent - any letter expressing an intention to take (or forgo) some action

postscript, PS - a note appended to a letter after the signature

name and address, destination, address - written directions for finding some location; written on letters or packages that are to be delivered to that location

line - text consisting of a row of words written across a page or computer screen; "the letter consisted of three short lines"; "there are six lines in every stanza"

invitation - a request (spoken or written) to participate or be present or take part in something; "an invitation to lunch"; "she threw the invitation away"