Henry George Liddell, Robert Scott, An Intermediate Greek-English Lexicon

I.to send down, let fall, Lat. demittere, Hom., etc.; [ἱστία] ἐς νῆας κάθεμεν (1st pl. aor2) we let down, lowered the sails, Od.; κ. ἄγκυραν Hdt.; κ. καταπειρητηρίην to let down a sounding-line, id=Hdt.; καθιέναι to sound, Plat.; καθῆκε τὰ σκέλη let down his legs, of one who had been lying down, id=Plat.; κ. δόρυ to let down one's pike, bring it to the rest, Xen.; κ. τὰς κώπας to let down the oars, so as to stop the ship's way, Thuc.:—rarely of striking, δι᾽ ὀμφαλοῦ καθῆκεν ἔγχος Eur.; γόνυ καθεῖσαν sank on their knee, id=Eur.:— Pass. to come down, of a cow's udder, Hdt.; καθεῖτο τὰ τείχη the walls were carried down to the water, Thuc.

2.to send down into the arena, enter for racing, ἅρματα, ζεύγη id=Thuc.; τοῦτον τὸν λόγον καθεῖκε has entered this plea, Dem.

3.to set at, Lat. immittere, Luc.:—Pass. to be put in motion, ἡ στρατηλασίη κατίετο ἐς τὴν Ἑλλάδα Hdt.

II.seemingly intr. (sub. ἑαυτόν), to swoop down like a wind, Ar.; of rivers, to run down, Plat.; κ. εἰς γόνυ to sink on the knee, Plut.