Extended Strong's Greek Lexicon (Abbott-Smith based)
to signal
Usage: κατα-σείω [in LXX: Da TH Bel 1:14 AR, 1Ma.6:38 * ;] __1. to shake down. __2. Of the hand, to shake or wave as a signal: τ. χεῖρα, Act.19:33; τ. χειρί, Act.13:16; id. with dative of person(s), Act.21:40; before inf., Act.12:17.† (AS)