what is the meaning of the word of god in the old and the new testament?

Answer 1

I am not sure if you mean when it is used capitalized or not capitalized. When it is capitalized, it is referring to Jehovah, or Yahweh, which means Jesus Christ in almost all cases. That is because Jesus Christ was the Creator of the world under the direction of God the Father, and this physical earth and all its inhabitants must look to Jesus Christ as their Advocate with the Father. The only time I can think of off the top of my head when the word "God" referred most definitely to God the Father was when Jesus Christ is on the cross in the New Testament and cries out, "My God, my God, why hast Thou forsaken me?" In this case, it is referring to God the Father, our Heavenly Father. This verse shows that Jesus Christ and God the Father are two separate individuals, as the Father withdrew His spirit so that His Son could finish the Atonement process Himself with His half-mortal body about to pass through death.
Now when you see the word "god" in lower case, it often refers to idols, such as Baal or Ashtoreth or Dagon. Those would be counterfeit gods.
In the case of Genesis 1:26-27, when God says, "Let us go down and make man in our image," it would be implied that He is not talking to Himself, but to other personages. From a Mormon point of view, I believe that He was, at the very least, talking to Jesus Christ and the Holy Ghost, who are the other separate and distinct members of the Godhead. Anyone else included in the Creation of the world may or may not have a capital G or lower case G. From my point of view, any of God's children would also be considered of the race of gods, and not counterfeit ones, either. That is just a given, as children inherit the same qualities as their parents have.

Answer 2

the meaning is the same for both testiments god~our lord almighty