Defective

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.	(Gram.) Lacking some of the usual forms of declension or conjugation; as, a defective noun or verb.
n.	1.	Anything that is defective or lacking in some respect.
	2.	(Med.) One who is lacking physically or mentally.

Adj.	1.	defective - having a defect; "I returned the appliance because it was defective" Synonyms: faulty
	2.	defective - markedly subnormal in structure or function or intelligence or behavior; "defective speech"
	3.	defective - not working properly; "a bad telephone connection"; "a defective appliance" Synonyms: bad

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