Quick Definition
lamentation
Strong's Definition
mourning (properly, by beating the breast)
Derivation: from G2875 (κόπτω);
KJV Usage: lamentation
Thayer's Greek Lexicon
κοπετός, κοπετοῦ, ὁ (from κόπτομαι, see κόπτω), the Sept. for ξΔρΐτΕΜγ; Latinplanctus, i. e. lamentation with beating of the breast as n sign of grief: κοπετόν ποιεῖσθαι ἐπί τίνι, Act_8:2; ἐπί τινα, Zec_12:10. (Eupolis in Bekker's annott. ad Etym. Magn., p. 776; Dionysius Halicarnassus, Antiquities 11, 31; Plutarch, Fab. 17.)
Mounce Concise Greek Dictionary
κοπετός kopetos 1x
pr. a beating of the breast, etc., in token of grief; a wailing, lamentation, Act_8:2
Abbott-Smith Greek Lexicon
κοπετός , -οῦ , ὁ
( < κόπτω , mid .),
[in LXX chiefly for H4553 ;]
= cl . κομμός , a beating of the head and breast, lamentation: seq . ἐπί c. dat. pers ., Act_8:2 .†
Moulton & Milligan — Vocabulary of the Greek NT
κοπετός [page 354]
For this familiar LXX word, which in the NT is confined to Act_8:2 , we may compare Kaibel 345 .3 f.
μῆτερ ἐμή , θρήν [ων ἀ ]ποπαύεο , λ [ῆ ]ξον ὀδυρμῶν
κ [αὶ ] κοπετῶν· Ἀῒδης οἶκ [τ ]ον ἀποστ [ρέφ ]εται .
Liddell-Scott — Intermediate Greek Lexicon
κοπετός κοπετός, οῦ, [Etym: = κομμός, Plut. , Anth. ]
STEPBible — Tyndale Abridged Greek Lexicon
κοπετός, -οῦ, ὁ
(κόπτω, mid.), [in LXX chiefly for מִסְפֵּד ;]
= cl. κομμός, a beating of the head and breast, lamentation: before ἐπί with dative of person(s), Act.8:2.†
(AS)