'World' in the Bible

For our boasting is this, the testimony of our conscience, that in simplicity and sincerity before God, (not in fleshly wisdom but in God's grace,) we have had our conversation in the world, and more abundantly towards you.

in whom the god of this world has blinded the thoughts of the unbelieving, so that the radiancy of the glad tidings of the glory of the Christ, who is the image of God, should not shine forth for them.

how that God was in Christ, reconciling the world to himself, not reckoning to them their offences; and putting in us the word of that reconciliation.

For grief according to God works repentance to salvation, never to be regretted; but the grief of the world works death.