A.act as guide, lead the way, abs., Hdt. 9.40,66, 6.135, Th.6.4; οἱ κατηγεόμενοι the guides, Hdt.7.130; “σὺ καθηγοῦ, ἕψομαι δ᾽ ἐγώ” Pl.Ep.312b; “κατ. τινὶ ἐς Χώρους” Hdt.4.125, cf. 6.102; “ἐπὶ Φωκέας” Id.7.215; also “κατ. τινὶ ὁδόν” Id.9.104.
2. c. acc. rei, show, explain, indicate, “τὸ ἕρμα κατ. τινί” Id.7.183, cf. X. An.7.8.10; ὁ τὸν ποταμὸν κ. he who was explaining it, i.e. showing where it was fordable, Pl.Tht.200e.
3. c. gen., κ. τοῦ λόγου to begin the discourse, Id.Smp.199c; ὧν καθηγήσαιτ᾽ ἂν τοῦτο of which this would be the beginning, Id.La.182c.
4. to be the first to do, establish, institute, Hdt.2.49,56: c. part., οὐ κατηγήσομαι νόμον τόνδε τιθείς I will not begin establishing this law, Id.7.8.ά.
5. instruct, teach, abs., Phld.Lib.p.21 O., al.; “κ. γραμματιστοῦ τρόπον” Diog.Oen.11; ὁ καθηγησάμενος the teacher, Plu.2.120a: c. gen. pers., to be teacher of . . , Str.14.5.14, D.H.Is.1, Amm.5.
6. in Logic, to be antecedent, Stoic.2.72.