Lexical Definition

‎κατόρθωμα‎ katórthōma (kat-or'-tho-mah) accomplishments ^G:N-N
from a compound of ‎κατά‎ and a derivative of ‎ὀρθός‎ (compare ‎διόρθωσις‎)

very worthy deed.

• something made fully upright, i.e. (figuratively) rectification (specially, good public administration)

Abbott-Smith

κατόρθωμα, -τος, τό, Rec. for διόρθωμα (q.v.), Ac 24:3.†

Abbott-Smith References

Liddell-Scott-Jones

κατόρθωμα-ωμα, ατος, τό,

success, opposed to εὐτύχημα, [Refs 4th c.BC+]; of literary style, [Refs 1st c.BC+]; variant for διορθ-, [NT]

__2 that which is done rightly, virtuous action, in plural, opposed to ἁμαρτήματα, [Refs 3rd c.BC+], etc.; τῶν καθηκόντων τὰ τέλεια, ={τὰ κ}., [Refs]
__3 perfection, τέλος καὶ πέρας καὶ κ. [Refs 4th c.BC+]
__4 Grammars, correct use, opposed to βαρβαρισμός, [Refs 1st c.AD+]

_{LSJ Scripture Refs: Acts.24.2}