Definitions for "Defection"
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.
withdrawing support or help despite allegiance or responsibility; "his abandonment of his wife and children left them penniless"
the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)
French term for default.