[] 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