'Natural' 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:

and likewise also the men, leaving the natural use of the woman, burned in their lust one toward another, men with men working unseemliness, and receiving in themselves that recompense of their error which was due.

without understanding, covenant-breakers, without natural affection, unmerciful:

for if God spared not the natural branches, neither will he spare thee.

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?