de·fec·tive 
(dĭ-fĕktĭv)
(dĭ-fĕktĭv)adj.
1. Having or showing a defect; faulty: a defective appliance.
2. Grammar Lacking one or more of the inflected forms normal for a particular category of word, as the verb may in English.
n.
Offensive
Offensive
One who has a physical or mental disability.
de·fective·ly adv.
de·fective·ness n.