Definition of blasphemous

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blas·phe·mous    (blsf-ms) KEY 

ADJECTIVE:

Impiously irreverent.

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ETYMOLOGY:
Middle English blasfemous, from Late Latin blasphmus, from Greek blasphmos, from blasphmein, to blaspheme ; see blaspheme

OTHER FORMS:
blasphe·mous·ly(Adverb), blasphe·mous·ness(Noun)