[] ( ˈpostage stamp, formal ) a small piece of paper with a design on it that you buy and stick on an envelope or a parcel/package before you post it邮票a tool for printing the date or a design or mark onto a surface戳；图章a design or words made by stamping sth onto a surface印章（记）；戳（记）；标记◆a passport with a visa stamp盖有签证戳记的护照◆(figurative) The new drug has not yet received the official stamp of approval.这种新药品尚未获得正式批准。date stamp revenue stamp rubber stamp