LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Opīmius1

Opīmius m (genitive Opīmiī or Opīmī)
Classical[ɔˈpiː.mi.ʊs]Ecclesiastical[oˈpiː.mi.us]

Meaning

  1. a Roman nomen gentilicium, gens or "family name" famously held by
    Lucius Opimius, a Roman consul

Declension

declension
formsingularplural
nominativeOpīmiusOpīmiī
genitiveOpīmiī
Opīmī		Opīmiōrum
dativeOpīmiōOpīmiīs
accusativeOpīmiumOpīmiōs
ablativeOpīmiōOpīmiīs
vocativeOpīmīOpīmiī

Ŏpīmĭus (old orthog. Ŏpēīmĭus, Eckh. D. N. 5, p. 264), i, m., Ŏpīmĭa, ae, f.,
I. the name of a Roman gens.
1. L. Opimius, consul A. U. C. 633, Cic. Brut. 83, 287; id. Cat. 1, 2, 4.—
2. Q. Opimius, consul A. U. C. 600, Cic. de Or. 2, 68, 277.—In fem.: Opimia, a Vestal, Liv. 22, 57.—Hence, adj.
A. ŏpī-mĭus, a, um, of or belonging to an Opimius: basilica Opimia, Varr. L. L. 5, 32, § 156. —
B. ŏpīmĭānus, a, um, of or belonging to an Opimius, Opimian: Opimianum vinum; and absol. as subst.: ŏpīmĭānum, i, n., very celebrated wine of the vintage of A. U. C. 633, when Opimius was consul, Mart. 3, 82, 24; 9, 87, 1; 10, 49, 2; Petr. 34; cf. Cic. Brut. 83, 287; Plin. 14, 4, 6, § 55; 14, 14, 16, § 94.

Origins

From opīmus (“rich, plump”) + -ius.

In the Academy Smith's classical dictionaries

Biography & mythologyOpimiusOpimius. 3. L. OPIMIUS Q. F. Q. N., son of the preceding, was praetor B. C. 125, in which year he marched against Fregellae, which had risen in revolt…
adjectivefirst/second-declension adjective
Opīmius2
Opīmius (feminine Opīmia, neuter Opīmium)
Classical[ɔˈpiː.mi.ʊs]Ecclesiastical[oˈpiː.mi.us]

Meaning

  1. adjectiveof or pertaining to the gens Opimia.

Declension

singular
formmasculinefeminineneuter
nominativeOpīmiusOpīmiaOpīmium
genitiveOpīmiīOpīmiaeOpīmiī
dativeOpīmiōOpīmiaeOpīmiō
accusativeOpīmiumOpīmiamOpīmium
ablativeOpīmiōOpīmiāOpīmiō
vocativeOpīmieOpīmiaOpīmium
plural
formmasculinefeminineneuter
nominativeOpīmiīOpīmiaeOpīmia
genitiveOpīmiōrumOpīmiārumOpīmiōrum
dativeOpīmiīsOpīmiīsOpīmiīs
accusativeOpīmiōsOpīmiāsOpīmia
ablativeOpīmiīsOpīmiīsOpīmiīs
vocativeOpīmiīOpīmiaeOpīmia

Origins

From opīmus (“rich, plump”) + -ius.

In the Academy Smith's classical dictionaries

Biography & mythologyOpimiusOpimius. 3. L. OPIMIUS Q. F. Q. N., son of the preceding, was praetor B. C. 125, in which year he marched against Fregellae, which had risen in revolt…

Quick answers

What does Opīmius mean in Latin?
Opīmius, a proper noun, means “a Roman nomen gentilicium, gens or "family name" famously held by”.
What is the genitive of Opīmius?
The genitive singular is Opīmiī. Opīmius is masculine, second declension.
How do you pronounce Opīmius?
In classical Latin, [ɔˈpiː.mi.ʊs]; in ecclesiastical (church) Latin, [oˈpiː.mi.us].