"defective" in the adjective sense
1. defective, faulty
having a defect
"I returned the appliance because it was defective"
2. defective
markedly subnormal in structure or function or intelligence or behavior
"defective speech"
3. bad, defective
not working properly
"a bad telephone connection"
"a defective appliance"
Source: WordNet® (An amazing lexical database of English)
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