plural of lettre / humanities/arts

classical studies (the study of Ancient Greek and Latin, their literature, history, etc.)

the study of French literature, history, etc.

to be well-read

plural of homme de lettres

in full, integrally, without resorting to abbreviations; not in figures / explicitly, plainly, clearly

homme de lettres, man of letters

mailbox, letterbox (box or slot into which a courier or postal worker puts letters for a recipient to collect) / mailbox, letterbox (box in which post can be left by a sender to be picked up by a courier or postman)

plural of boîte aux lettres

plural of lettre de motivation