In religious writing, an archangel is the most important angel of all, sometimes described as ranking above the regular angels.

   You'll come across the noun archangel if you're reading Christian, Judaic, or Islamic religious texts. In the Christian Bible, the word archangel is only used twice, once generally and once to refer to Michael, although there are many other figures in Christianity considered to be archangels. The Greek root word, arkhangelos, is made up of arkh, "first or chief," and angelos, "angel."