What does ad litteram mean in Latin?

ad litteram, a adverb, means “word-for-word, literally”.

How do you pronounce ad litteram?

In classical Latin, [ˈad ˈlɪt.tɛ.rãː]; in ecclesiastical (church) Latin, [ˈad ˈlit.te.ram].

adverb

Classical[ˈad ˈlɪt.tɛ.rãː]Ecclesiastical[ˈad ˈlit.te.ram]

word-for-word, literally
Cicero quidem omnia orationis lumina in hunc locum congerit, mediam quandam, ut arbitror, secutus viam: ut neque omnis sermo schema iudicaretur neque ea sola quae haberent aliquam remotam ab usu communi fictionem, sed quae essent clarissima et ad movendum auditorem valerent plurimum. Quem duobus ab eo libris tractatum locum ad litteram subieci, ne fraudarem legentes iudicio maximi auctoris.Indeed, Cicero places all manner of rhetorical flourish in this category, and in doing so follows what seems to me a middle course, such that he does not judge any expression to be a figure of speech, nor only that which differs in some fashion from common usage, but rather that which is the most brilliant and the most capable of moving the audience. This discussion of his, which is covered in two books, I have included below verbatim to avoid denying my readers the judgement of that illustrious author.(Can we date this quote?), Quintilian, Institutio Oratoria, book IX, section I:

From ad (“to”) + litteram (“(the) letter”).

Calques

Direct borrowings