What is the Latin word for lastly?

The usual Latin words for “lastly” are novissimus, postrēmō. The right choice depends on the sense; see the distinctions below.

English → Latin

“lastly” in Latin

novissimussuperlative degree of novus; last, latest; rear, hinder postrēmōat last, finally

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

lastly

ad ultimum; ad extremum; denique postremo (the three former, of the last and last but one; postremo, only of the last): novissime (at last, in respect of other preceding circumstances; Vid: Hirt., B.G., 8, 48, Herzog); quod superest, quod reliquum est, quod restat, quod extremum est (in announcing a conclusion).

Quick answer

What is the Latin word for lastly?: The usual Latin words for “lastly” are novissimus, postrēmō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.