unnature noun 1verb 1forms 3 noun1 •That which is contrary to nature; the unnatural.So as to be rather unnature, after all, than nature. — 1858 verb1 •(no longer used) To change the nature of; to invest with a different or contrary nature.A right heavenly nature, indeed, as it were unnaturing them, doth so bridle them [the elements]. — 1587 formsunnatured · unnaturing · unnatures