IPA: /dɪˈfɛktər/
KK: /dɪˈfɛktər/
A person who leaves their country or group to join another, often for political reasons.
The defector revealed important information about the government's plans.
Defector → It is formed from "defectus" (from Latin, meaning a failure or a falling away) and the suffix "-or" (meaning one who). The word "defector" refers to one who has fallen away or abandoned a cause or allegiance.
Think of someone who has 'fallen away' from their original group or cause — that's why a defector is someone who abandons their allegiance.