a person who commits a crime 犯罪者；违法者；罪犯◆The measures have allowed Customs to concentrate on persistent offenders (= people who commit many crimes). 这些措施使海关将注意力集中在惯犯身上。
a person or thing that does sth wrong 做错事的人（或事物）◆Businesses are losing billions through energy inefficiency, with London offices the worst offenders. 企业因能源效率低损失数以十亿计，伦敦办公楼是祸首。