(dated) plural of man of letters

plural of scarlet letter

plural of letter grade

plural of air letter

A letter written in superscript, usually when it indicates an abbreviation.

plural of sea letter

The customary certificate of national character which neutral merchant vessels are bound to carry in time of war; a passport for a vessel and cargo.

plural of letter box

In Ancient Rome, one of the first eight letters of the alphabet, which were repeated successively from the first to the last day of the year. One of these always expressed the market day, which returned every nine days (every eight days by our reckoning).

(law, historical, Scotland) The process or authority by which a person, directed by the decree of a court of justice to pay or perform anything, is ordered to comply.