'World' in the Bible

Faithful is the saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief:

And without controversy great is the mystery of godliness; He who was manifested in the flesh, Justified in the spirit, Seen of angels, Preached among the nations, Believed on in the world, Received up in glory.

for we brought nothing into the world, for neither can we carry anything out;

Charge them that are rich in this present world, that they be not highminded, nor have their hope set on the uncertainty of riches, but on God, who giveth us richly all things to enjoy;