altum

• (Classical Latin) IPA^(key): [ˈaɫ.tũː]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈal̪.t̪um]

Forms of altus. The adverb is an adverbial accusative.

altum

1. inflection of altus:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular

altum n (genitive altī); second declension

1. the deep, the sea
2. the height (Can we verify⁽⁺⁾ this sense?)

Second-declension noun (neuter).

altum (not comparable)

1. (rare) deeply

   Synonym: altē

See the etymology of the corresponding lemma form.

altum

1. accusative supine of alō

• “altum”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “altum”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• "altum", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• altum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• Carl Meißner, Henry William Auden (1894) Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • (ambiguous) the tide is coming in: aestus ex alto se incitat (B. G. 3.12)
    
  • (ambiguous) to study the commonplace: cogitationes in res humiles abicere (De Amic. 9. 32) (Opp. alte spectare, ad altiora tendere, altum, magnificum, divinum suspicere)
    
  • (ambiguous) what he said made a deep impression on..: hoc verbum alte descendit in pectus alicuius
    
  • (ambiguous) to go a long way back (in narrative): longe, alte (longius, altius) repetere (either absolute or ab aliqua re)
    
  • (ambiguous) to put to sea: vela in altum dare (Liv. 25. 27)
    
  • (ambiguous) the storm drives some one on an unknown coast: procella (tempestas) aliquem ex alto ad ignotas terras (oras) defert
    
  • (ambiguous) to make fast boats to anchors: naves (classem) constituere (in alto)
    
• https://logeion.uchicago.edu/altum