a person who defects from a cause, country, alliance, etc.

Origin of defector

1655–65; < Latin dēfector renegade, rebel, equivalent to dēfec- (variant stem of dēficere to become disaffected, revolt, literally, to fail; see defect) + -tor -tor
Related formsnon·de·fec·tor, nounre·de·fec·tor, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for defector

Contemporary Examples of defector

Historical Examples of defector

Word Origin and History for defector

1660s, agent noun in Latin form from defect, or else from Latin defector "revolter," agent noun from deficere (see deficient).

Online Etymology Dictionary, © 2010 Douglas Harper