Matthew 1:17γενεαὶ
In all, then, there were fourteen generations from Abraham to David, fourteen from David to the exile to Babylon, and fourteen from the exile to the Christ.
Mark 8:12γενεὰ
Jesus sighed deeply in His spirit and said, “Why does this generation demand a sign? Truly I tell you, no sign will be given to this generation.”
Luke 1:48γενεαὶ
For He has looked with favor on the humble state of His servant. From now on all generations will call me blessed.
Acts 2:40γενεᾶς
With many other words he testified, and he urged them, “Be saved from this corrupt generation.”
Ephesians 3:5γενεαῖς
which was not made known to men in other generations as it has now been revealed by the Spirit to God’s holy apostles and prophets.
Philippians 2:15γενεᾶς
so that you may be blameless and pure, children of God without fault in a crooked and perverse generation, in which you shine as lights in the world

Abbott-Smith

γενεά, -ᾶς, ἡ
(γίγνομαι), [in LXX chiefly for דּוֹר, דֹּר (Cremer, 148) ;]

1. race, stock, family (in NT, γέννημα, which see).

2. generation;

(a) of the contemporary members of a family: pl., Mat.1:17 (cf. Gen.31:3, מוֹלֶדֶת); metaphorically, of those alike in character, in bad sense, Mat.17:17, Mrk.9:19, Luk.9:41 16:8, Act.2:40;

(b) of all the people of a given period: Mat.24:34, Mrk.13:30, Luk.21:32, Php.2:15; pl., Luk.1:48; esp. of the Jewish people, Mat.11:16 12:39, 41 42, 45 16:4 23:36, Mrk.8:12, 38 Luk.7:31 11:29, 30-32, 50, 51 17:25, Act.13:36, Heb.3:10" (LXX) ; τὴν γ. αὐτοῦ τίς διηγήσεται, Act.8:33 (LXX);

(with) the period covered by the life-time of a generation, used loosely in pl. of successive ages: Act.14:16 15:21, Eph.3:5, Col.1:26; εἰς γενεὰς καὶ γ. (= לִדוֹר וָדוֹר, al.), Luk.34:17, al), Luk.1:50; εἰς πάσας τὰς γ. τοῦ αἰῶνος τῶν αἰώνων, Eph.3:21 (Ellic, in l.; DCG, i, 639f.).
† (AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.