[] a mistake in sth that means that it is not correct or does not work correctly 错误；缺点◆They found a flaw in the software's security system. 他们发现这款软件的保安系统有一个缺陷。◆a fatal (= extremely serious) design flaw 致命的设计缺陷◆The business plan has fundamental (= very serious) flaws. 这项业务计划存在根本性错误。⨁fatal / fundamental / serious flaws 致命／根本性／严重的错误⨁design / security / structural flaws 设计／安全／结构性缺陷