special delivery
noun
mass noun
1- (in the UK) guaranteed delivery of a letter within the UK the day after posting（英国）信件特别快递（保证国内信件寄出的次日即投递到人）。
1.1
- (in the US) delivery of mail outside normal hours on payment of an additional fee（美国）（正常投递时间以外加资的）特种快递。
1.2
- count noun a letter or parcel sent by a special-delivery service特种快递信件（或包裹）。