Defective

Part of speech: adjective (a.)

1. 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.

2. Lacking some of the usual forms of declension or conjugation; as, a defective noun or verb. -- De*fect"ive*ly, adv. -- De*fect"ive*ness, n.