LATIN DICTIONARYLexicon Latīnum
noun · masculinesecond declension

posterī

posterī m pl (genitive posterōrum)

Meaning

  1. pluralplural onlydescendants

Latīnē defined in Latin in our graded readers

hominēs futūrī
posterī -ōrum (m) — in Epistulae, ch. 15

postĕri, ōrum, v. posterus, I.

Quick answers

What does posterī mean in Latin?
posterī, a noun, means “descendants”.
What is the genitive of posterī?
The genitive singular is posterōrum. posterī is masculine, second declension.