Easton's Bible Dictionary: M. G. Easton, M.A., D.D.

Arm

Used to denote power (Ps. 10:15; Ezek. 30:21; Jer. 48:25). It is also used of the omnipotence of God (Ex. 15:16; Ps. 89:13, 98:1, 77:15; Isa. 53:1; Jn. 12:38; Acts 13:17)