- 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.
Meaning of 'defection' (Princeton's WordNet)
1 . defection
[ n]
Meaning (1): - withdrawing support or help despite allegiance or responsibility
Example in sentence:
his abandonment of his wife and children left them penniless