- 1the official system used for sending and delivering letters, packages, etc. a mail service/train/truck Your check is in the mail. We do our business by mail. see airmail, snail mail, voice mail
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- 2letters, packages, etc. that are sent and delivered There isn't much mail today. I sat down to open the mail. Is there a letter from them in the mail? hate mail (= letters containing insults and threats) see junk mail, return mail, surface mail
- 3messages that are sent or received on a computer Check regularly for new mail. see electronic mail, e-mail
- 4= chain mail a coat of mail
Check pronunciation: mail