1. To avert one's eyes very quickly, especially in a furtive, nervous, or secretive manner. I could tell by the way he kept glancing away that he was lying.
2. To deflect away after striking some surface at a shallow angle. He raised his shield, and the incoming arrows glanced away harmlessly into the bushes.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.