Matthew 5:48τέλειοι
Be perfect, therefore, as your heavenly Father is perfect.
Romans 12:2τέλειον
Do not be conformed to this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what is the good, pleasing, and perfect will of God.
1 Corinthians 2:6τελείοις
Among the mature, however, we speak a message of wisdom—but not the wisdom of this age or of the rulers of this age, who are coming to nothing.
Colossians 1:28τέλειον
We proclaim Him, admonishing and teaching everyone with all wisdom, so that we may present everyone perfect in Christ.
Hebrews 5:14τελείων
But solid food is for the mature, who by constant use have trained their senses to distinguish good from evil.
James 1:4τέλειοι
Allow perseverance to finish its work, so that you may be mature and complete, not lacking anything.

Abbott-Smith

τέλειος, -α, -ον
(τέλος), [in LXX chiefly for שָׁלֵם, תָּמִים and cogn. forms ;]
having reached its end, finished, mature, complete, perfect;

1. of persons, primarily of physical development,

(a) full-grown, mature: Heb.5:14; ethically: Php.3:15; opposite to νήπιος (-άζειν), 1Co.2:6 14:20, Eph.4:13; τ. καὶ πεπληροφορημένοι, Col.4:12; τ. ἐν Χριστῷ, Col.1:28;

(b) complete, perfect (expressing the simple idea of complete goodness, without reference either to maturity or to the philosophical idea of a τέλος; see Hort on Jas.1:4): Mat.5:48 19:21, Jas.1:4 3:2; of God, Mat.5:48.

2. Of things, complete, perfect: Rom.12:2; ἔργον, Jas.1:4; νόμος, Jas.1:25; δώρημα, Jas.1:17; ἀγάπη, 1Jn.4:18; τὸ τ., 1Co.13:10; compar., τελειοτέρα (σκηνή), Heb.9:11.
(There is probably no reference in St. Paul's usage to the use of this term in the ancient mysteries; cf. ICC on Col.1:28; but see also Lft., in l, and Notes, 173 f.) †
SYN.: see: ὁλόκληρος (and cf. Rendall, He., 158 ff.)
(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.