Quick Definition
earnestness, strenuousness, intentness
Strong's Definition
intentness
Derivation: from G1618 (ἐκτενής);
KJV Usage: X instantly
Thayer's Greek Lexicon
ἐκτένεια, ἐκτενειας, ἡ (ἐκτενής), a later Greek word (cf. Lob. ad Phryn., p. 311);
a. properly, extension.
b. intentness (of mind), earnestness: ἐν ἐκτένεια, earnestly, Act_26:7. (2Ma_14:38; Jdt_4:9. Cf. Grimm on 3Ma_6:41 (where he refers to Cicero, ad Att. 10, 17, 1).)
Mounce Concise Greek Dictionary
ἐκτένεια ekteneia 1x
pr. extension; in NT intenseness, intentness; ἐν ἐκτενείᾳ , intently, perseverance, earnestness, Act_26:7
Abbott-Smith Greek Lexicon
**† ἐκ -τένεια , -ας , ἡ
( < ἐκτενής ),
[in LXX : Jdt_4:9 , 2Ma_14:38 , 3Ma_6:41 * ;]
zeal, intentness, earnestness ( cf. Deiss., BS , 262): Act_26:7 .†
Moulton & Milligan — Vocabulary of the Greek NT
ἐκτένεια [page 198]
This subst., which is unknown to Attic Greek (cf. Lob. Phryn. p. 311), is found in its ethical meaning, as in Act_26:7 (cf. 2Ma_14:38 al. ), in P Par 63 i. 12 (B.C. 164) (= P Petr III. p. 18) καλῶς ποιήσεις τὴν πᾶσαν προσενεγκάμενος ἐκτένε̣ι̣αν καὶ π [ρο ]νοηθείς , you will do well in using every effort and taking every precaution (Mahaffy) : cf. from the inscrr. Priene 108 .382 (after B.C. 129) ἡ τοῦ δήμου πρὸς τοὺς εὐεργετοῦντας [αὐτὸν ἐ ]κτένεια δι᾽ αἰῶνος ἐπίσημον ἔχῃ τὴν χα̣[ριν , IMAe 1032 .10 (ii/B.C.) τὰν πᾶσαν ἐκτένειαν καὶ κακοπαθίαν παρεχόμενος , Syll 732 .28 (i/B.C.) ἡ σύνοδος ἀποδεξαμένη τὴν ἐκτένειαν καὶ φιλοτιμίαν αὐτοῦ , and Cagnat IV. 984 .6 μετὰ πάσης ἐκτενείας καὶ λαμπρότητος .
Liddell-Scott — Intermediate Greek Lexicon
ἐκτένεια ἐκτένεια, ἡ, "intensity, zeal, earnestness", NTest. [Etym: from ἐκτενής]
STEPBible — Tyndale Abridged Greek Lexicon
ἐκ-τένεια, -ας, ἡ
(ἐκτενής), [in LXX: Jdth.4:9, 2Ma.14:38, 3Ma.6:41 * ;]
zeal, intentness, earnestness (cf. Deiss., BS, 262): Act.26:7.†
(AS)