Dictionary entry

διάνοια

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

διάνοια, -ας, ἡ

[in LXX chiefly for לֵב, לֵבָב;]

the understanding, mind: Lk 1:51, Eph 4:18, Col 1:21, I Pe 1:13, II Pe 3:1, I Jo 5:20; pl., Eph 2:3; in quotations from LXX, Mt 22:37, Mk 12:30, Lk 10:27, He 8:10 10:16 (Cremer, 79, 438).†