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 | (Middle Ages) flexible armor made of interlinked metal rings |
| 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 |