[] a thing that replaces sth that is old, broken, not good enough, not available, etc. 替代品；替换物◆Aluminium is becoming popular as a replacement for steel in cars. 铝作为汽车用钢的替代品越来越普遍。◆If you are not happy with any item, return it for a replacement or refund. 任何一件商品，只要不满意，都可以退换或退款。
[] a person who replaces another person in an organization, for example by taking their job （尤指工作中的）接替者，替代者◆It won't be easy to find a replacement for Louisa. 找一位替代路易莎的人可不容易。◆We have been forced to use replacement workers during the strike. 我们在罢工期间一直被迫使用替代工人。
[] the act of replacing one thing with another, especially sth that is newer or better 替换；更换◆the replacement of old, inefficient electrical equipment 更换陈旧低效的电气设备◆Our PCs are due for replacement. 我们的个人电脑应该更换了。◆replacement parts 替换零件