διδαχή

διδαχῆς ἡ (διδάσκω) (from Herodotus down);
1. teaching, viz. that which is taught: Mk 1:27; Jn 7:16; Acts 17:19; Rom. (); ; 2 Jn 1:10; Rev 2:24; ἡ διδαχή τίνος, one's doctrine, i. e. what he teaches: Mt 7:28; Mt 16:12; Mt 22:33; Mk 1:22; Mk 11:18; Lk 4:32; Jn 18:19; Acts 5:28; Rev 2:14f; ἡ διδαχή of God, τοῦ κυρίου, τοῦ Χριστοῦ, the doctrine which has God, Christ, the Lord, for its author and supporter: Jn 7:17; Acts 13:12; 2 Jn 1:9; with the genitive of the object, doctrine, teaching, concerning something: Heb 6:2 (Winer's Grammar, 187 (176); 192 (181); 551 (513)); plural Heb 13:9.
2. (the act of) teaching, instruction, (cf. διδασκαλία (on the supposed distinction between the two words and their use in the N. T. see Ellicott on 2 Tim 4:2; they are associated in 2 Tim 4:2, 2 Tim 4:3; Tit 1:9)): Acts 2:42; 2 Tim 4:2; ἐν τῇ διδαχή, while he was teaching, a phrase by which the Evangelist indicates that he is about to cite some of the many words which Jesus spoke at that time, Mk 4:2; Mk 12:38; τοῦ κατά τήν διδαχήν πιστοῦ λόγου, the faithful word which is in accordance with the received (2 Tim 3:14) instruction, Tit 1:9; in particular, the teaching of the διδάσκαλος (which see 6) in the religious assemblies of Christians: λαλεῖν ἐν διδαχή, to speak in the way of teaching, in distinction from other modes of speaking in public, 1 Cor 14:6; ἔχω διδαχήν, to have something to teach, 1 Cor 14:26.