apostasy

n. heresy; disloyalty

Apostasy (from Greek αποστασία, meaning a defection or revolt, from απο, apo, "away, apart", στασις, stasis, "standing") is a term generally employed to describe the formal abandonment or renunciation of one's religion, especially if the motive is deemed unworthy. In a technical sense, as used sometimes by sociologists without the pejorative connotations of the word, the term refers to renunciation and criticism of, or opposition to one's former religion. One who commits apostasy is an apostate, or one who apostatises. Apostasy is generally not a self-definition: very few former believers call themselves apostates and they generally consider this term to be a pejorative. One of the possible reasons for this renunciation is loss of faith, another is the failure of alleged religious indoctrination or brainwashing.
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Noun
1. the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)
(synonym) renunciation, defection
(hypernym) rejection
2. the act of abandoning a party or cause
(synonym) tergiversation
(hypernym) abandonment, forsaking, desertion

(n.)
An abandonment of what one has voluntarily professed; a total desertion of departure from one's faith, principles, or party; esp., the renunciation of a religious faith; as, Julian's apostasy from Christianity.
  

n.
دھرم نشٹ , اپنا دھرم تياگن , انحراف , الحاد