'Nature' in the Bible

For this cause God gave them up unto vile passions: for their women changed the natural use into that which is against nature:

(for when Gentiles that have not the law do by nature the things of the law, these, not having the law, are the law unto themselves;

and shall not the uncircumcision which is by nature, if it fulfil the law, judge thee, who with the letter and circumcision art a transgressor of the law?

For if thou wast cut out of that which is by nature a wild olive tree, and wast grafted contrary to nature into a good olive tree; how much more shall these, which are the natural branches , be grafted into their own olive tree?