Defection

n.

1.

Act of abandoning a person or cause to which one is bound by allegiance or duty, or to which one has attached himself; desertion; failure in duty; a falling away; apostasy; backsliding. The general defection of the whole realm. - Sir J. Davies.

Noun	1.	defection - withdrawing support or help despite allegiance or responsibility; "his abandonment of his wife and children left them penniless" Synonyms: desertion, abandonment
	2.	defection - the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes) Synonyms: apostasy, renunciation

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