a thing that is added to sth else to improve it or make it more complete 补充（物）；增补（物）；添加物◆Videoconferencing is a useful supplement to traditional meetings. 视频会议可有效地补足传统会议。
an amount of money that you pay for an extra service or item 额外费用；附加费◆There is a supplement of €30 per person for a single room. 住单间每人另付 30 欧元。
something that you eat in addition to what you usually eat, especially in order to stay healthy 补养品◆an online seller of vitamins and dietary supplements 维生素和膳食补充剂的网上销售商
an extra section that comes with a newspaper or a book, report, etc. （报纸、书籍、报告等的）补编，补遗，附录，附件◆a supplement to the main report 主报告的附件➡colour supplement