an unsigned leaflet distributed clandestinely

Marked with letters. / Literate (able to read writing in letters). / Educated, especially having a degree (entitled to put an abbreviation such as BS, MA, PhD, MD after a signature).

simple past tense and past participle of letter

present participle of letter

Written text, especially when printed.

(law) Rare form of letters patent (“a type of legal document in the form of an open letter issued by an authority granting a monopoly, right, status, or title to a person or organization”).

(law) A type of legal document in the form of an open letter issued by an authority granting a monopoly, right, status, or title to a person or organization.

plural of letter patent

plural of capital letter

plural of letteral