Noun
1. the bags of letters and packages that are transported by the postal service
2. the system whereby messages are transmitted via the post office;
"the mail handles billions of items every day""he works for the United States mail service""in England they call mail `the post'"3. a conveyance that transports mail
4. any particular collection of letters or packages that is delivered;
"your mail is on the table""is there any post for me?""she was opening her post"5. (Middle Ages) flexible armor made of interlinked metal rings