<span>a : imperfect in form or function : faulty <span>replaced a defective light switch</span></span><span>b : falling below the norm in structure or in mental or physical function <span>defective eyesight</span> <span>a defective gene</span></span><span> 2<span> grammar : lacking one or more of the usual forms of inflection (see inflection 3) <span>Must is a defective verb.</span></span></span>defectively adverb defectiveness noun
.imperfect or faulty."complaints over defective goods"<span>synonyms:<span>faulty, flawed, imperfect, shoddy, inoperative, malfunctioning, out of order, unsound;<span>More</span></span></span>
