What does "blasphemous" mean?

Blasphemous: Speaking or writing blasphemy; uttering or exhibiting anything impiously irreverent; profane; as, a blasphemous person; containing blasphemy; as, a blasphemous book; a blasphemous caricature. "Blasphemous publications." Porteus. Nor from the Holy One of Heaven Refrained his tongue blasphemous. Milton. Note: Formerly this word was accented on the second syllable, as in the above example.