best-before dateBrE /ˌbest bɪˈfɔː deɪt/ 🔊NAmE /ˌbest bɪˈfɔːr deɪt/ 🔊 noun (BrE) a date printed on a container or package, advising you to use food or drink before this date as it will not be of such good quality after that 最佳食用期限，最佳保质期，保存期限（见于食物或饮料包装） ➡ compare sell-by date