cast down
1. To throw something to the ground. In this usage, a noun or pronoun can be used between "cast" and "down." When she heard us mocking her, she cast down her book and stormed out of the room.
2. To lower something (typically one's gaze). Because my son is so shy, he usually casts down his eyes whenever he meets someone.
cast something down
to hurl or throw something down. She cast the glass down, breaking it into a thousand pieces. She cast down the tray and all that was on it.
cast down
1. Throw down, hurl to the ground, as in She cast down her coat on the grass. [Late 1400s]
2. Bend down, lower, as in He cast down his eyes. [Late 1300s]