postage stamp(n = noun.communication) postage, stamp - a small adhesive token stuck on a letter or package to indicate that that postal fees have been paid;
is a kind of item, token

date stamp, food stamp, postage, postage meter, revenue stamp, rubber stamp, stamp, stamp act, stamp album, stamp battery, stamp collecting, stamp collection, stamp collector, stamp dealer, stamp down, stamp duty, stamp mill, stamp out, stamp pad, stamp tax, trading stamp