(Middle Ages) flexible armor made of interlinked metal rings | mail consisting of large numbers of identical items (circulars or advertisements) sent to individual addresses at less than 1st-class rates and paid for in one lot |
a conveyance that transports the letters and packages that are conveyed by the postal system | |
the system whereby messages are transmitted via the post office | |
the bags of letters and packages that are transported by the postal service | |
any particular collection of letters or packages that is delivered | |