defective
adjective
1. having a defect
- I returned the appliance because it was defective
Similar word(s): imperfect, faulty
2. markedly subnormal in structure or function or intelligence or behavior
- defective speech
Similar word(s): abnormal, unnatural
3. not working properly
- a defective appliance
Similar word(s): malfunctioning, nonfunctional, bad
noun
1. A person or thing considered to be defective.