From Latin āctus (“a cattle drive; a cattle path; units of length and area”). Doublet of act.

actus (plural actus or acti)

1. (historical units of measure) A former Roman unit of length, equal to 120 Roman feet (about 35.5 m)
2. (historical units of measure) A former Roman unit of area, equivalent to a square with sides of 1 actus (about 0.125 ha)

• (units of area): juger, jugerum (2 acti)

• "actus, n.", in the Oxford English Dictionary, Oxford: Oxford University Press.

• scuta

• Audio (France (Lyon)):

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actus f

1. plural of actu

• (Classical Latin) IPA^(key): [ˈaːk.tʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈak.tus]

Perfect passive participle of agō (“make, do”). Compare Sanskrit अक्त (akta, “driven”).

āctus (feminine ācta, neuter āctum); first/second-declension participle

1. made, done, having been done

First/second-declension adjective.

From agō (“to do, make, drive”) +‎ -tus (suffix forming fourth declension action nouns from verbs).

āctus m (genitive āctūs); fourth declension

1. (abstract) a setting in motion, impulse, motion
   1. a cattle drive, the act of driving cattle or a cart
   2. a cattle path or narrow cart track
2. (concrete) act, action, doing, deed

   Synonyms: āctiō, factum, rēs, gestum, facinus

   actum est de aliquo ― It is over for someone, the fate of someone is sealed

3. a doing, performing; a performance
   1. the representation of a play or other public show
   2. a part, a character
   3. an act in a play
   4. (figurative) a period, part

      extrēmus āctus aetātis ― the last act of one's life

4. (historical units of measure) actus (a former Roman unit of length equal to 120 Roman feet (about 35.5 m))
5. (historical units of measure) actus (a former Roman unit of area equivalent to a square with sides of 1 actus (about 0.125 ha))

Fourth-declension noun.

• (unit of length): pēs (¹₁₂₀ āctūs)
• (unit of area): decempeda (¹₁₄₄ āctūs); clima (¹₄ āctūs); iugerum (2 āctūs); hērēdium (4 āctūs); centuria (400 āctūs); saltus (1600 āctūs)

• āctuārius
• āctuō
• āctuōsus
• āctūtum

• ācta

• “actus”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “actus”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• actus in Enrico Olivetti, editor (2003-2026), Dizionario Latino, Olivetti Media Communication
• "actus", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “actus”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • an act: actus
    
  • (ambiguous) I'm undone! it's all up with me: perii! actum est de me! (Ter. Ad. 3. 2. 26)
    
  • (ambiguous) to have all one's trouble for nothing: rem actam or simply actum agere (proverb.)
    
  • (ambiguous) rest after toil is sweet: acti labores iucundi (proverb.)
    
  • (ambiguous) it's all over with me; I'm a lost man: actum est de me
    
  • (ambiguous) a good conscience: conscientia recta, recte facti (factorum), virtutis, bene actae vitae, rectae voluntatis
    
  • (ambiguous) to declare a magistrate's decisions null and void: acta rescindere, dissolvere (Phil. 13. 3. 5)
    
  • (ambiguous) amnesty (ἀμνηρτία): ante actarum (praeteritarum) rerum oblivio or simply oblivio
    
• “actus”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers
• “actus”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

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