This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. an act or incidence of defecting

n. 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.

n. A lack: a failure; especially, failure in the performance of duty or obligation.

n. The act of abandoning a person or a cause to which one is bound by allegiance or duty, or to which one has attached himself; a falling away; apostasy; backsliding.

n. the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)

n. withdrawing support or help despite allegiance or responsibility

"Their defection from the progressive coalition over the past two years is the main reason Democrats are facing a beat-down tomorrow."

rejection   

deficient    deficit    deficiency    defector    defect    defective   

desertion    apostasy    backsliding   

advection    affection    circumspection    collection    complexion    confection    connection    convection    correction    detection   

disloyalty    desertion    disaffection    disobedience    apostasy    perfidy    betrayal    apostacy    treachery    dereliction