- Wanting in something; incomplete; lacking a part; deficient; imperfect; faulty; -- applied either to natural or moral qualities; as, a defective limb; defective timber; a defective copy or account; a defective character; defective rules.
- [Gram] Lacking some of the usual forms of declension or conjugation; as, a defective noun or verb.
Etymology: L. defectivus: cf. F. défectif. See Defect