What does posterius mean in Latin?

posterius, a adverb, means “later, afterwards”.

Where does posterius come from?

Proto-Indo-European *pós → Proto-Indo-European *pósti → Proto-Italic *posti → Proto-Italic *posteros → Latin posterius.

adverb

posterius (comparative)

comparativelater, afterwards
Posterius istaec tec. 197 BCE, Plautus, Persa 800–801
Unum [filium] vis curem: curo; et est dis gratia quom ita ut volo est. Iste tuos ipse sentiet160 BCE, Publius Terentius Afer, Adelphoe 1.138–140

Charlton Lewis's shorter dictionary for students: the same scholarship in plain, modern definitions.

posterius adv. comp.

posterus, later, at a later day : iubet posterius ad se reverti, by and by : si posterius fuisset, had he lived later .

Latin -ius Latin posterius From posterus + -ius.