DEFECT

I. noun see: do Date: 15th century 1. an imperfection that impairs worth or utility ; shortcoming , an imperfection (as a vacancy or an unlike atom) in a crystal lattice, a lack of something necessary for completeness, adequacy, or perfection ; deficiency , II. intransitive verb Etymology: Latin ~us, past participle of deficere Date: 1596 to forsake one cause, party, or nation for another often because of a change in ideology, to leave one situation (as a job) often to go over to a rival , ~or noun