defect /dɪˈfekt/ verb [I]
› WORKPLACE to leave one company or organization and form or join another: defect from/to sth Many of our sales team have defected to the competition.
› COMMERCE, MARKETING to stop buying a particular product or service and buy a different one instead: defect from/to sth Millions of customers defected to rival telecommunications companies.
› POLITICS to leave your country or group and join another because you disagree with the ideas of those in control: He's a pilot who defected to the United States. defection noun [C or U] › Since the introduction of the new tariff, there have been fewer customer defections.