LATIN DICTIONARYLexicon Latīnum
preposition

uls

uls (+ accusative)
Classical[ˈʊɫs]Ecclesiastical[ˈuls]

Meaning

  1. Old Latinrarewith accusativebeyond
    Uls Catō prō ultrā posuit.Cato used uls for ultrā.1839 [8th century CE], Paulus Diaconus, edited by Karl Otfried Müller, Excerpta ex libris Pompeii Festi De significatione verborum, page 379, line 3:

Choosing the right word Döderlein's Latin Synonyms

Trans · Uls · Ultra

Trans and uls, like περᾶν, in opp. to cis, denote, on the other side, with the character of unaccented prepositions, as a mere geometrical designation of place, like super; trans (τρανές) is the usual, uls the antiquated and obsolete expression; whereas ultra (comparative from ollus, ille), like πέρα, in opp. to citra, with emphasis and distinction of the relative distance of that which lies on the other side, like supra. The separation denoted by ultra is merely that of a boundary; the separation denoted by trans, that of an obstruction. Tac. Germ. 29. Protulit magnitudo populi Romani ultra Rhenum ultraque veteres terminos imperil reverentiam . . . Non numeraverim inter Germaniæ populos, quanquam trans Rhenum Danubiumque considerint, eos, qui decumates agros exercent. Eutrop. vii. 9. Liv. xxii. 43. Tac. Ann. xvi. 17. (iii. 109.)

uls (ouls;
I. v. infra), prep. with acc. [from the pronominal root il, whence ille], beyond; opp. to cis (ante-class.): uls Cato pro ultra posuit, Fest. p. 379 Müll.: ouls lucum facutalem (followed by cis lucum Esquilinum), Form. Sacr. Argeor. ap. Varr. L. L. 5, § 50 ib.: et uls et cis Tiberim, Varr. ib. 5, § 83: quinqueviri constituti sunt cis Tiberim et uls Tiberim, Dig. 1, 2, 2, § 31; cf. Gell. 12, 13, 8.

Origins

From Proto-Indo-European *h₂ol-, the o-grade of the root *h₂el- (“beyond, other”), closely related to the suffixed comparative adjective ulterior, the adverb ultrō, and the adverb/preposition ultrā. De Vaan (citing Leumann 1977:220) argues that the rare word uls is not the oldest of these forms, but instead was a later analogical formation from ultrā based on cis and citrā. Other Latin words from this root include ille and alius. The accusative case of its complement comes from the pre-PIE directional.

Quick answers

What does uls mean in Latin?
uls, a preposition, means “beyond”.
How do you pronounce uls?
In classical Latin, [ˈʊɫs]; in ecclesiastical (church) Latin, [ˈuls].