Defection is defined as deserting your country or cause.
When you are supposed to be in the army serving your country and you flipflop sides and start working for the other side, this is an example of defection.
- abandonment of loyalty, duty, or principle; desertion
- the act of defecting from one's country
- a failing or failure
Origin of defectionClassical Latin defectio from defectus: see defect
- an act or incidence of defecting