'World' in the Bible

And the cares of this world, and the deceitfulness of riches, and the lusts of other things entering in, choke the word, and it becometh unfruitful.

For what shall it profit a man, if he shall gain the whole world, and lose his own soul?

But he shall receive an hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions; and in the world to come eternal life.

Verily I say unto you, Wheresoever this gospel shall be preached throughout the whole world, this also that she hath done shall be spoken of for a memorial of her.

And he said unto them, Go ye into all the world, and preach the gospel to every creature.