Wiktionary
behind the arc
adv. (context basketball informal English) Outside the three-point line.
Usage examples of "behind the arc".
Then dirt and asphalt fountained up from Highway 25, right behind the ARC.
Troy grinned grimly, then drew Mehryl up behind the arc so that he would be ready to help his warriors if the wolves outweighed them.
The waist-high curved panels contained both ray-shield generators and energy absorbers, and the Yevetha had nothing to fear from hand blasters so long as they stayed behind the arc of the shields.