'World' in the Bible

This is a faithful and trustworthy statement, deserving full acceptance and approval, that Christ Jesus came into the world to save sinners, among whom I am foremost.

And great, we confess, is the mystery [the hidden truth] of godliness:He (Jesus Christ) who was revealed in human flesh,Was justified and vindicated in the Spirit,Seen by angels,Preached among the nations,Believed on in the world,Taken up in glory.

For we have brought nothing into the world, so [it is clear that] we cannot take anything out of it, either.

As for the rich in this present world, instruct them not to be conceited and arrogant, nor to set their hope on the uncertainty of riches, but on God, who richly and ceaselessly provides us with everything for our enjoyment.