Also see definition of "Operation" in Word Study
Operation
OPERATION [isbe]
OPERATION - op-er-a'-shun (ma`ashe, "work"; energeia, energema, "energy"): Twice used in the Old Testament of God's creative work (Ps 28:4,5; Isa 5:12). The Holy Spirit's inworking and power are manifest in the bestowal of spiritual gifts on individuals and on the church (1 Cor 12:6 the King James Version), and in the resurrection of Jesus Christ, through which energy or operation of God those dead in sins are, through faith, raised to newness of life (Col 2:12 the King James Version).
Also see definition of "Operation" in Word Study