(historical) Referring to a type of musical notation used by Shakers, based on letters instead of notes. / (rare) Regarding letters of the alphabet.

(printing) Obsolete form of literal (“a misprint that affects a letter”). / (Lojban) The name of a letter, such as gy. for the letter G.

(education) A letter of the alphabet assigned as an evaluation of schoolwork, with A generally being the best. Passing grades may also carry a plus or minus sign, with an A-minus (A-) better than B-plus (B+) and so on.

(printing) The printing process in which ink is applied to the top surface of a raised image area, which is then pressed against paper to transfer the image.

An employee of the post office who delivers mail (post) to, and collects it from, a residence or business, or from public mailboxes.

A letter or written communication that serves to introduce an accompanying document; especially, a letter that introduces a résumé or curriculum vitae.

A letter that is written generically with blanks to be filled in with individual details, often sent in bulk, and frequently regarded as impersonal.

(US) A letter mailed at a post office and either kept for general delivery, or delivered to a post office box, at that same post office.

A letter from a wife or girlfriend to her husband or boyfriend, informing that the relationship is over. Usually precipitated by the writer's having met a third party.

A day marked in red on calendars; a church feast day. / (idiomatic) A particularly significant day; a day of personal or sectarian celebration.