/ ɑːk; NAmE ɑːrk/ noun , verb
( geometry ) part of a circle or a curved line
—picture at circle
a curved shape :
the arc of a rainbow
The beach swept around in an arc.
( technical ) an electric current passing across a space between two terminals
—see also arc lamp
■ verb ( arc·ing / ˈɑːkɪŋ; NAmE ˈɑːrk-/, arced , arced / ɑːkt; NAmE ɑːrkt/) [ v ] ( technical )
to move in the shape of an arc
to form an electric arc
late Middle English (denoting the path of a celestial object, especially the sun, from horizon to horizon): via Old French from Latin arcus bow, curve.