To change the form, quality, aspect, or effect of; to
   alter; to metamorphose; to convert; to transform; -- often with to or
   into before the word denoting the effect or product of the change; as,
   to turn a worm into a winged insect; to turn green to blue; to turn
   prose into verse; to turn a Whig to a Tory, or a Hindu to a Christian;
   to turn good to evil, and the like.