LATIN DICTIONARYLexicon Latīnum
proper nounfourth declension

Almus Spīritus

Almus Spīritus m sg (genitive Almī Spīritūs)
Ecclesiastical[ˈal.mus ˈspiː.ri.tus]

Meaning

  1. EcclesiasticalLatinHoly Spirit
    Sit laus Patri, laus Filio, / Compar tibi sit gloria, / Qui dona mundo dividens / Descendis, alme Spiritus. Amen.Praise be to the Father, praise be to the Son; / The same glory be to you, / Who, distributing gifts to the world, / Descend, Holy Spirit. Amen.1787, Breviarium diocesis Lausannensis [Breviary of the Diocese of Lausanne], Ad completorium in die sancto Pentecostes, Hymnus, page 460:

Declension

declension
formsingularplural
nominativeAlmus Spīritus—
genitiveAlmī Spīritūs—
dativeAlmō Spīrituī—
accusativeAlmum Spīritum—
ablativeAlmō Spīritū—
vocativeAlme Spīritus—

Origins

Literally, “nourishing spirit”

Quick answers

What does Almus Spīritus mean in Latin?
Almus Spīritus, a proper noun, means “Holy Spirit”.
What is the genitive of Almus Spīritus?
The genitive singular is Almī Spīritūs. Almus Spīritus is fourth declension.