- (adjective): From altum, supine of alō (“grow”).
- (participle): Perfect passive participle of alō (“nourish”).
Corresponds to Proto-Indo-European *h₂eltós, a suffixed form of the root *h₂el- (“grow, nourish”) (compare Proto-Germanic *aldaz, whence English old and world).
altus (feminine alta, neuter altum, comparative altior, superlative altissimus); first/second declension
- high, tall
altus m (feminine alta, neuter altum); first/second declension
- nourished, having been nourished
- fed, having been fed, maintained, having been maintained, developed, having been developed
- kept, having been kept, supplied with necessities, having been supplied with necessities, supported financially, having been supported financially
- altus1 in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- altus2 in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- altus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
- du Cange, Charles (1883), “altus”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
- “altus” in Félix Gaffiot’s Dictionnaire Illustré Latin-Français, Hachette (1934)
- Carl Meissner; Henry William Auden (1894) Latin Phrase-Book, London: Macmillan and Co.
- (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)