| 1. | letters, packages, etc., that are sent or delivered by means of the postal system: Storms delayed delivery of the mail. |
| 2. | a single collection of such letters, packages, etc., as sent or delivered: to open one's mail; to find a bill in the mail; The mail for England was put on the noon plane. |
| 3. | Also, mails. the system, usually operated or supervised by the national government, for sending or delivering letters, packages, etc.; postal system: to buy clothes by mail. |
| 4. | a train, boat, etc., as a carrier of postal matter. |
| 5. | electronic mail; e-mail. |
| 6. | of or pertaining to mail. |
| 7. | to send by mail; place in a post office or mailbox for transmission. |
| 8. | to transmit by electronic mail. |
| 9. | copy the mail, Citizens Band Radio Slang. to monitor or listen to a CB transmission. |

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