LATIN DICTIONARYLexicon Latīnum
nounsecond declension

summum bonum

summum bonum n (genitive summī bonī)

Meaning

  1. Medieval LatinneuterThe highest good; an ultimate goal of human existence.

Declension

declension
formsingularplural
nominativesummum bonumsumma bona
genitivesummī bonīsummōrum bonōrum
dativesummō bonōsummīs bonīs
accusativesummum bonumsumma bona
ablativesummō bonōsummīs bonīs
vocativesummum bonumsumma bona

Origins

From summus (“superlative of superus”) + bonum (“a moral good”).

Quick answers

What does summum bonum mean in Latin?
summum bonum, a noun, means “The highest good; an ultimate goal of human existence.”.
What is the genitive of summum bonum?
The genitive singular is summī bonī. summum bonum is second declension.