LATIN DICTIONARYLexicon Latīnum
noun · neutersecond declension

falsum

falsum n (genitive falsī)
Classical[ˈfaɫ.sũː]Ecclesiastical[ˈfal.sum]

Meaning

  1. neuterAn untruth, falsehood, fraud, deceit, lie; forgery.
    Ex falso quodlibet.⁽ᵂᴾ⁾ From falsehood anything [follows]: ⊥→Q.

Declension

declension
formsingularplural
nominativefalsumfalsa
genitivefalsīfalsōrum
dativefalsōfalsīs
accusativefalsumfalsa
ablativefalsōfalsīs
vocativefalsumfalsa

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

falsum ī, n
falsus, an untruth, falsehood, fraud, deceit : finxisse falsi quicquam, T.: vera an falsa audierim, T.: Falsa iurans, O.: falsum scribere: vero distinguere, H.: Acclinis falsis animus, H.

Origins

From falsus, perfect passive participle of fallō (“deceive, trick”).

In the Academy Smith's classical dictionaries

AntiquitiesFalsumFalsum The crime of falsum is not defined, by Roman legal writers, but it consisted of acts of fraud which were injurious to fides publica, such as fo…

Quick answers

What does falsum mean in Latin?
falsum, a noun, means “An untruth, falsehood, fraud, deceit, lie; forgery.”.
What is the genitive of falsum?
The genitive singular is falsī. falsum is neuter, second declension.
How do you pronounce falsum?
In classical Latin, [ˈfaɫ.sũː]; in ecclesiastical (church) Latin, [ˈfal.sum].