Pronunciation: (blas'fu-mē),[key] —n., —pl.-mies. 1. impious utterance or action concerning God or sacred things.
2. Judaism. a. an act of cursing or reviling God.
b. pronunciation of the Tetragrammaton (yhvh) in the original, now forbidden manner instead of using a substitute pronunciation such as Adonai. 3. Theol.the crime of assuming to oneself the rights or qualities of God.
4. irreverent behavior toward anything held sacred, priceless, etc.: He uttered blasphemies against life itself.