A defect, flaw, or fault in an object, system, or plan; a deficiency that prevents proper function or performance.
その製品には設計上の欠陥があり、回収が決まった。
The product had a design defect, and a recall was decided.
欠陥が見つかったので、メーカーに修理を依頼した。
A defect was found, so I asked the manufacturer for repairs.
契約書の欠陥を弁護士に指摘してもらった。
I had a lawyer point out defects in the contract.