Quick Definition
μοιχεία, ας, ἡ n.f. adultery
Strong's Definition
adultery
UBS Dictionary of the Greek New Testament
noun, f. | -ας | μοιχάομαι
88.276 · Moral and Ethical Qualities and Related Behavior · Sexual Misbehavior
to commit adultery, adultery sexual intercourse of a man with a married woman other than his own spouse From the standpoint of the NT, adultery was normally defined in terms of the married status of the woman involved in any such act. In other words, sexual intercourse of a married man with an unmarried woman would usually be regarded as πορνεία ‘fornication’ (88.271), but sexual intercourse of either an unmarried or a married man with someone else’s wife was regarded as adultery, both on the part of the man as well as the woman. In view of the married status of the woman being the determining factor in μοιχάω, μοιχεύω, μοιχάομαι, μοιχεία, and related terms (88.277-88.278), there is a significant contrast with πορνεύω and related expressions (88.271). πορνεύω, however, may be regarded as more generic in meaning, and thus in certain contexts including adultery.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μοιχεία, -as, 7, (μοιχεύω), adultery: Jn. viii. 3; Gal. v. 19 Rec.; plur. [W. § 27,3; B. 8 123, 2]: Mt. xv. 19; Mk. vii. 21. (Jer. xiii. 27; Hos. ii. 2; iv. 2; [Andoe., Lys.], Plat., Aeschin., Lcian., al.)
Mounce Concise Greek Dictionary
μοιχεία moicheia 3x
adultery, Mt. 15:19; Mk. 7:22; Jn. 8:3*
Abbott-Smith Greek Lexicon
μοιχεία, -ας, ἡ
(< μοιχύω), [in LXX: Ho 2:2 (4) (נַאֲפוּפִים), 4:2 (נָאֹף), Je 13:27 (נִאֻפִים), Wi 14:26*;]
adultery: Jo 8:[3]; pl. (v. WM, 220; Bl., § 32, 6), Mt 15:19, Mk 7:21.†
Moulton & Milligan — Vocabulary of the Greek NT
μοιχεία. For the plur. of this subst., as in Mt 1513, Mk 75], cf. παρατυγχάνουσα τῷ Tod ["Apews πορ]νίας <Kal> μοιχείας κατίσ[τ]ησιν, ‘Venus in conjunction with Mars causes fornications and adulteries” (Edd.). On the OT usage of μοιχεία see s.v. πορνεία. Wackernagel (He//enistzca, p. 9) conjectures a possible Doric form *pouxa, ‘‘ adultery.
Liddell-Scott-Jones — Greek-English Lexicon
μοιχεία (moicheia) — adultery. μοιχ-εία, ἡ, adultery, [Refs 5th c.BC+]